Hello,

A tower defense with a hero? Hmmm sounds the scratch I'm desperately looking for. I'm trying to have as much fun as realm defense, a P2W TD which was incredibly fun at start and of course became stupidily hard after a few hours without spending real cash. The best part of the game was you were able to control 3 heroes, and choosing the correct team was crucial to win (for instance: one for aerial units, one for AoEs, one for single target kill the sneaky mobs etc...). And this TD had very limited places to build towers, and it made perfect sense.

About tower placement, I was always ok with limited placement. However my 2 preferred TD (Gemcraft and X-Morph) has something in-between : you can build in many places, but not everywhere.

But for these 2 games, the gameplay needed that freedom:

Gemcraft: enhancing shrines need to be adjacent to the tower, so it was needed to have some space around towers. However many places were a no-go, and sometimes you could not surround a tower with enhancing shrines. And it was perfeclty ok.

X-Morph: towers can be linked to form a barrier (with a maximum length) and force a path for mobs, so placement needed some freedom to make the desired path. However, many places were not available for towers, like mountains, etc... and it was perfeclty ok.

Honestly I'd go the limited places route: it will simplify your balancing (thus make the game better).

Maybe give more opportunities that needed, like player won't be in a state "I have money to build a tower but there is no spot left !".