Hmmm if you want something new to make your AoS map somewhat unique, here is my suggestion..
Instead of 4 skills, try making it 6
- the two in the center part will be most likely a passive or a core mechanic for your hero. You can use this two slots to create a unique playstyle in every heroes you make.
then the 4 skill at the bottom will be 3 active and 1 ultimate.
How this thing works?
Sample1:
ORC WOLFRIDER, the wolf will have a stamina meter and it affects the skills you use (the 4 active skill/spells) the main core is to balance the usage of the wolf's stamina.
The two core skills of Wolfrider will be
"wolf's stamina" - shows how many stamina your wolf have, and passively regenerate stamina while standing still.
"consume corpse" - your wolf consume nerby corpse to regain its stamina.
sample skills:
growl - increase the attack speed of nearby allied unit while reducing the enemies movement speed. the area of effect varies on how many stamina your wolf currently have.
consume x mana x ws(wolf's stamina)
whip - increase the movement speed of your unit for a certain amount of time.
the speed varies on how many stamina your wolf currently have.
consume x mana x ws
sample2:
Ogre Brute, this heroes main mechanic is to gain rage and control it.
The core abilities of this hero will be:
"Rage" - each damage you take will add rage. increasing your effectiveness in combat. (it also show your rage meter)
"Boiling anger" - passively increases your attack speed and slightly increase your movement speed depending on your rage.
sample skills:
Vengeful strike(autocast) - adds x physical dmg and x% of your rage as spell dmg.
consume x mana and x% rage.
Anger control - ogre brute will try to relax and control its rage making the ogre more vulnerable to attack, but slowly regaining its hp.
slowly drain rage.
Change Skill upgrade
- instead of generic skill upgrade that uses hero points, the skills will automatically improve itself each time your hero level up.
Change how hero level points works
- make every skill available in level 1 but not the ulti (the ulti will be unlock depending what level you prefer and it doesnt spent hero points). remove the boring plus attribute and instead of the generic single upgrade, try to make a 3 different upgrade on one skill and 2 different upgrade for the ultimate. each upgrade will give a different effects for the skill. The player can only choose 2 of 3 upgrade in their active spells and 1 upgrade for their ulti. giving the player a way to customize their hero not only by item.