Every hero has an AoE (It'd be pretty impossible to play without), but also other abilities like buffs. I usually get the buffs before AoEs (after one level of at least one AoE). Buffs can be passive, AoE, usable, and affect just about everything.
Single target abilities in a mass enemys map are pretty useless, and even though it seems its all the same, the heroes are pretty damn different. Ive tried multiple heroes.
not sure if its possible, but give different slots different background images and tooltips when empty.
I like the idea :) Unfortunately i had to scrap all items from my map since i just couldn't be bothered to make more, making the loots, and then the whole floor would be littered with items cause no one picked them up -.- And with my new system, there's very little time for picking up or selling items... I might reintroduce items using my talent system (as unlockables)
I think 4 categories for equipped is enough, making it too many makes it noob-unfriendly, but also makes better players have more choices.
I like the idea about consumables, but some "permanent" consumables might be good as well (so that you don't have to run back to a shop), they could be kind of like abilities. Graviton Beam, Chain Lightning, Pocket Time Bomb, Short Cloak, etc.
I hope you get done sometime soon :) at least a playable version. Or a demo for Map Night, you could collect a lot of feedback that way.
Anyway, i think Hero Line Wars would be best for the name :) That way you will be the one that will forever have THE Hero Line Wars, and anyone wanting to make their own HLW will need another name (Or subname like "HLW: Banana" or w/e)