Your hero should get skills that add damage and health to your units rather than yourself, because the hero dies in a few hits in later levels. Also i think the spells you learn should be able to level up rather than take 3 skill slots to learn the same spell 3 times.
Finished the game, and i thought of some good ideas. Beating survival should add like 5 gold souls and you shoud have the ability to upgrade blocks through an upgrade shop of sorts. Wether it be redused cost, faster attack, more dmg. etc. i think it would add to the fun of survival. (+ if you agree)
It needs the ability to get more/different troops. Maby a troop merchant or something. And add a way to add or remove members with a set number of party members or something like that. + If you agree
You should make it more known that you get bonus on your sponser site before we start playing, that way we dont unlock half the races just to find out we cant unlock everything because were not on that site.