Sorry if I am late (Really late) on the reply, since I was studying a lot for the past few weeks, but here are my answers to your questions:
1st Spell:
-The allies are healed once by 50% of their current life
-The Allies are healed wen the hero attacks
-AoE of the Heal = level * 150.00
2nd Spell:
-Buff Duration = 3 * level
-Can only target self
-Can only get one buff from the list of buffs
3rd Spell:
-Buff Durarion = 5 * level
-Can only target self
-Can only get one buff from the list of buffs
-Good point; one attack then buff dissappears.
Final Question's answer:
- I currently have none in the map since I haven't had a need to use one, so use one that you preffer, but I recommend Nesthaurus' DDS.