I've gotten the ball rolling and now have a solid idea for the rest of the Fire Skill Tree, as well as developing a few other mechanics on the side while I was at it. Big thanks to Alfryd for the idea of the Ignite spell, it was fun to code that in and implement it. Here's what's new:

0.08 Changelog

Attribute Changes
Intelligence
-Since Intelligence's role of increasing various aspects of a spell that weren't otherwise covered by Willpower/Artifice/Wisdom has now been covered by the ability to Level Up abilities, Intelligence has different bonuses for heroes overall.
-Every 10 points of Intelligence increases Spell % Damage by 1.
-Every 20 points of Intelligence increases Spell Resistance Penetration % by 1.
-Intelligence still increases flat Spell Damage by 1 per 4 points of Intelligence.

Building Changes
Bank
-Removed minimum build radius required when placing additional Banks near each other.
Since banks only gain revenue based on the number of heroes with an account at a bank, there is no reason to limit their build placement in such a way.

General Changes
New Damage/Resistance Types Added: Slashing, Piercing, Crushing, Fire, Cold, Electric, Poison, Magic, Divine, Necrotic, Chaotic, Force
-All Listed Damage and Resistance types been added to the game. Currently all game objects have, by default, 0 Resistances for all types currently.
-Damage Types can be increased by flat or % amounts. Damage Type Resistance Penetration can be included to allow bypassing of highly resistant enemies.
-A list of Resistances for each game object will need to be added at some point, for now it can be modified through spells effects.
-All spells can now have variable damage amounts, with a minimum and maximum damage.
The additional types were included by a helpful contributor: Fortuanado. Thanks to him I was able to include more than just the Fire damage type to the report.

New Mechanic Added: Knockback/Pull
-Found a way to implement a knockback and pull system into the game. The limitation of finding angles in the game can be partially overcome by calculating the difference between two coordinates, making such a system possible.

Hero Changes
Learning Orientation Traits
-Heroes will determine how they choose to spend points on skills based on their Learning Orientation Traits.
-The traits are composed of two parts currently, a Primary Orientation and Secondary Orientation.
-Primary Orientation determines the heroes weighted skill prioritization, and generally covers the skills that a hero will learn.
-Primary Orientations will usually be specific to certain Heroes and even certain Trees.
-Some Primary Orientations can be exclusionary to certain Secondary Orientations.
-Secondary Orientation determines the distribution of points in the skills learned from the Primary Orientation.
-Secondary Orientations are usually broader and more all encompassing, not necessarily specific to certain Heroes or Trees.

Wizard
-Primary Orientations:
Fire: Defensive: The Wizard focuses on the skills in the Fire Tree that benefit his or his allies survival as well as conditional damage spells.
Fire: Explosive: The Wizard focuses on the skills in the Fire Tree that do up front Fire Damage immediately.
Fire: Sustain: The Wizard focuses on the skills in the Fire Tree that benefit drawn-out combat and spellcasting with concern for Mana/Health manageability.
Fire: All: The Wizard endeavors to learn all skills in the Fire Tree.

-Secondary Orientations:
Spontaneous: The skills of the Primary Orientation are levelled up randomly.
Balanced: The skills of the Primary Orientation are levelled up to be near equal in level towards each other.
Focused: A few skills are levelled up near exclusively compared to others learned in the Primary Orientation.

Examples:
A Wizard that is Fire: All and Balanced will attempt to keep all fire skills even in terms of level with each other.
A Wizard that is Fire: All and Spontaneous will generally level up all fire skills by random.
A Wizard that is Fire: All cannot be Focused.
A Wizard that is Fire: Explosive and Balanced will attempt to level up primarily up-front Damage spells evenly with each other.
A Wizard that is Fire: Explosive and Focused will attempt to prioritize one or two up-front Damage spells to alternate the majority of their skill points into.

Fire Skill Tree Old Spell

-All damage spells can now include variable damage numbers with a minimum and a maximum amount.
-Fire skills can now be levelled up to level 20. They still retain only one Tier Bonus for level 5.

Fire Bolt
-Changed damage from 6 [spell] damage to 5 - 7 [fire] damage.
-Changed damage per level from 2.5 [spell] damage to 2.5 [fire] damage.
-Changed Mana Cost increase per level from 1 to 0.75.
-Changed level 5 Tier bonus from [Grants a 20% chance for the next cast of Fire Bolt to cost no mana] to [Grants a 33% chance for Fire Bolt to cost no mana].
-Level cap raised from 5 to 20.
Damage per level and damage from synergy applies to both maximum and minimum damage values.
The tier bonus change makes new functions smoother to implement without really changing anything. The current cast of Fire Bolt will end up being free rather than the next cast when it procs.

Fire Ball
-Changed damage from 15 [spell] damage to 13 - 17 [fire] damage.
-Changed damage per level from 4 [spell] damage to 4 [fire] damage.
-Changed radius per level from 8 to 5.
-Changed Tier Bonus for stacking Burn Damage to no longer stack. Targets that are burning will instead refresh their duration and apply the highest damage of Burn from the Fireball cast at them.
-Level cap raised from 5 to 20.
Damage per level and damage from synergy applies to both maximum and minimum damage values.
The old tier bonus made multiple Wizards piling on their Fireball spells onto a single target or group of targets deal exceedingly larger amounts of damage over time than was intended.

Embers - Passive
-No longer regenerates health/mana based on mana spent.
-Attempted to make health/mana regeneration based on Fire damage dealt.
-Mechanics of Embers changed.
-Passively grants Mana Regeneration as the Wizard's current Mana goes lower.
-Grants up to 1.25 Mana Regeneration as the Wizard's Mana decreases.
-Level cap raised from 5 to 20.
Each point in this skill increases Mana Regeneration by 0.75.
Tier Bonus:
Level 5: Passively increases HP regeneration as the Wizard's Mana increases. For example: If your Wizard has 0%/50%/100% current mana with Embers at level 2, he will have +2.0/+1.0/+0 Mana Regeneration and +0/+1.0/+2.0 Health Regeneration.
The old mechanic for this spell made Wizards have virtually limitless mana regardless of how many spells they cast or how expensive the spell is because it scales too well with mana cost/effective damage that spells deal.
Currently not feasible to have a mechanic where a resource spent is then regenerated based on amount spent (in this case, Spending Mana means Gaining Mana, whether directly from Mana Spent, or indirectly from Fire Damage dealt from Mana Spent to deal said Fire Damage).
The new mechanic using a constant regeneration based on lack of Mana rather than Spending of mana seems to work far better.

Fire Skill Tree New Spells

Ignite
-Engulfs a target in flames, dealing 6 - 9 [fire] damage per second for 7 seconds. Each second the target is on fire, nearby enemy units can also be caught on fire.
-Radius: 50.
-Cooldown: 10 seconds.
-Range: 75% of Max Cast range.
-Mana Cost: 15.
-Required Level: 10.
-Pre-Requisite: None.
Each point in this skill increases [fire] damage by 1.75, Radius by 6, Duration by 0.5 seconds and Mana Cost by 2.25.
Synergy Bonuses:
None
Tier Bonus:
Level 5: Ignite can now be cast on buildings as well as set them on fire from nearby units/structures targeted by Ignite.
Ignite damage over time counts as its own damage over time container separate from Burning damage over time. In other words, the two damage over time types will stack if a unit is both Burning and caught in Ignite.

Heatwave - Passive
-Deals 9 - 11 [fire] damage to enemies in an area around the Wizard each time he casts a spell.
-Radius: 80.
-Required Level: 10.
-Pre-Requisite: Fireball.
Each point in this skill increases [fire] damage by 2 and Radius by 8.
Synergy Bonuses:
Embers: 5% increased damage per level
Fire Ball: 7% increased radius per level
Tier Bonus:
Level 5: Slightly knocks back all enemies damaged by Heatwave.

System Changes
Mana Regeneration System
-Mana regenerates at an increased rate when a hero is resting/recuperating at their home, at an Inn, or at a Gazebo.



Despite my earlier holdups on the ability to develop a knockback/pull system, it appears that Majesty has a relatively quick clockspeed of around 50 miliseconds (0.05 seconds). While figuring out how to get the angle between points considering Majesty doesn't handle angles, I did manage to solve the problem of finding a relative angle between two points by comparing coordinates of the caster and the target.

Some feedback regarding the next stages of Tiers for abilities would be welcome, specifically on where to take the progression of tiers: 1)Four tier bonuses: One for every 5 levels. 2) 3 tier bonuses up to level 15 with extra points just being for the benefit of a higher level ability. 3) 3 tier bonuses for levels 5, 10, and a tier bonus with a bigger impact for 20. Or 4)A combination of #1 and #3: 4 Tier bonuses, one every 5 levels then a tier bonus with a bigger impact for getting a skill to Level 20.

Suggestions for what kind of tier bonuses past the first stage of a skill would also be welcome as well.

Next up: Coding the remainder of the Fire Skill Tree and adding in-game information so people won't need to read the massive changelog to understand what the mod changes.