The Survivalists middle tree calls from a list of 3 random perks to choose from per rank (which are balanced to the other classes gaining the same perks)

Loadout:
Any Primary Weapon (but not Templar Gauntlets)
Pistol or Sword

Squaddie:
Charge! (Dash up to an enemy and attack them with your sidearm)
Snapshot (after moving you can shoot with sniper rifles but at an aim & crit penalty)
Fire Pistol
Slice (A sword attack that can be made for 1 action against adjacent enemies)

Corporal:
Sidearm Specialist (+1 dmg with sidearms)
Implacable
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Random Choice From:
Bloodtrail (do +1 damage against targets that have been hurt this turn)
Reflex (gain an action point after being fire at, once per mission without skirmisher rebalance)
Total Combat (can use items for 1 action)
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Sergeant:
Shadowstep
Hunters Instincts (Do +1 dmg against flanked targets & get 10% crit chance with swords)
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Random Choice From:
Aim
Hip Fire (take a free shot with your primary weapon at an aim penalty)
Stick and Move (+5 defense & +3 mobility)
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Lieutenant:
Weapon Specialist (+1 dmg with primary weapons)
Deadeye
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Random Choice From:
Cool Under Pressure (+10 aim and can crit on overwatch shots)
Deadshot (+10 crit chance)
Fortitude (+10 defense)
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Captain:
Deep Cover
Untouchable
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Random Choice From:
Blitz (Gain +25 crit chance on charge attacks)
Rush (Charge attacks are free but get a cooldown)
Zero In (Gain +25 Aim on charge attacks)
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Major:
Weapon Expert (+2 dmg with Primary weapons)
Seek and Destroy (50% chance to take shots at newly revealed enemies)
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Random Choice From:
Extra Layers (+2 armor)
Hide (can re-enter concealment at any time)
Longreach (Confers Squadsight & Longwatch)
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Colonel:
Rupture
Rapid Fire
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Random Choice From:
Reaper
Saturation Fire
Serial
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GTS:
Conceal & Carry (gives a smaller detection radius when concealed and remains concealed when the squad is revealed)