Ok, I've this idea which works something like Company of Heroes commander tree.
Each Demigod player can choose a tree for example, the Rook has 2 or more power trees that goes. This will encourage diversification of the Demigods skills as no one would be able to predict what the other is using without seeing one of the skills in play.
Each skill in the power tree has to be bought using skill points or gold.
Rook Power Disciplines (Just an example)
A)Earthern Kin (name of tree 1)
A1) Stonewall :- Summon a stonewall to re-route/block enemy troops for the next 10 seconds.
A2) Chasm :- Crack open a fissure in the ground where enemy troops fall in for the next 10 seconds. Recharge time 120 secs.
A3) Call of the King :- Call upon the spirit of the dead king that fights for you for the next 60 secs. Recharge time 300 secs.
Metal Master (name of tree 2)
B1) Iron Hammer :- Transform your stone hammer into an iron hammer for the next 30 seconds. 300% Damage increased and 100% stun. 300 secs recharge.
B2) Gold Mayhem :- Convert your gold into weapons and armor for the next 3 waves of your army. 300% Damage increase and 300% Armor. 300 secs recharge.
B3) Coat of arms :- Enhance your ally's weapon with silver for the next 60 secs. 300% Damage increase. 300 secs recharge.
The above is just an example and does not have to be in the game, its an idea put forth for different Disciplines so that no similar Demigod would be the same.
Thanks. 