INTRO:
The Voice of El is a great choice if you are just starting out in Elysium. It is also a very powerful late game race which is grossly underestimated. You play as the religious faction collecting relics for El, your God. Your ancient enemy is the demon Ba'al which the High Prestess is trying to summon. This race is great for beginners because many of the armies you summon you don't control. The computer does all that tedious micromanagement for you. You can stratergize all you want with your own person army.

POINTS of INTEREST:
Your commanders are bishops which can convert settlements and hamlets and villages and farms, etc. to the faith. Converted settlements pay a tithe to the Curch of El every year, WHETHER YOU CONTROL THEM OR NOT. You receive a portion of this tithe, unless you upgrade your bishop to a Pontiff, and claim all of it. The more villages on a map, the more potential gold per year.

Upgrade your starting bishop to a Cardinal (250 Gold) to summon the Inquision (250 Gold from a Cardinal 150 Gold from Pontiff). Do this as fast as you can, as the Inquisition is a powerful army which seeks out all of the villages you have not converted yet, takes control of them, and converts them. This army is not controlled by you, easing the micromanagement burden.

Cardinals and Pontifs can Summon the Crusade (200/100Gold respectively) which is another powerful allied army which automatically seeks and destroys the opponent of your choice.

All blessed units can be permanently globally upgraded endlessly by spending Relics. The cost increases per use.

Breaking the first six seals cost relics, which in turn allows randomly spawning units to ally themselves to your cause.
These incluse flagellants, a weak controllable infantry which can be upgraded
Angles: a weak uncontrollable spellcaster which can convert enemies to your side and bless units.
Archangels: a not weak uncontrollable spellcaser which is devastating
Celestial Lions: Uncontrollable but very powerful
Paladins: which are upgraded templar spellcaster commanders which you can control.
Seraphs: archangels on steroids (uncontrollable)
Ophans: basically unkillable Seraphs (uncontrollable)

Playing as a crusading sect allows the purchase of the following special units:
Templars. Fantastic units which can be continually upgraded
Palace guards. Only if you cannot afford Templars

STRATEGY
Early Game:
Use your starting army and secondary commander to control and convert as many farms, villages, etc. right away. Save your gold to upgrade your primary commander to a Cardinal. Keep saving until you can call the Inquisition. Let the Inquisition rake in gold and tithe.

MID GAME:
Trade for relics, secure iron income to buy templars, use relics to begin breaking seals and upgrading troops. Avoid purchasing non blessed units e.g. swordsmen and spearmen as they cannot benefit from your upgrades. Archers are great at defending forts and cities.
Upgrade your Cardinal to a Pontiff, and keep him at home. Start a crusade against anyone annoying you. Expand slowly trying to build up and secure resources.

END GAME:
Know where the Crusade and Inquisition are. Summon them again as soon as they die. Have the gold ready if they are deep in enemny territory.
Secure a Library to summon mages.
DO NOT INCORPORATE flagellants into your controllable armies. The seaphs and archangles etc will travel to your controlled converted villages and sweep them up into its army, making them a devastating ally.
Break the seventh seal only if you are ready. This brings forth the apocalypse, which might totally wipe out your enemeis and allies alike. Death comes with a legion of longdead. A pit opens which spawns limitless disease deamons which will wipe out most human armies. Locusts destroy villages, Forest fires erupt. Its bad news bears, but the chaos can benefit you if you have prepared. Or if you are getting slaughtered.

PRO TIPS:
Use a secondary commander to follow the Inquisition or Crusade. You can take artifacts from your uncontrollable commanders!
Beware of Templars. They are powerful and all you should buy for your armies, BUT, the uncontrollable seraphs, orphans can take them for their armies if you leave them sitting in a castle or fort, etc. This isnt terrible, but can be quite annoying. Use this to your advantage.
Upgrade paladins at libraries to get the level 2 spell Avatar, which makes them invulnerable to physical damage.
Upgrade your army last: You can do this infinitely provided you have enough relics. The buffs are: HP increase, Morale increase, Fire Shield, Armor Increase (Ithink this is broken, I didnt notice an incease) Pierce resistance, Awe.
All stack infinitely.