Bhelogan

If you want to play good, you must find your type of hero and concentrate on him (oops, off topic ) and about that increasing the damage as element level goes up, i think it is not bad but it might make game too easy for the pros (i am welcome to the idea myself). Two ways to fix this 1) Make the damage bonus something you have to purchase (eg. extra fire damage aura) or 2) Scale the damage bonus to the difficulty level.

Perhaps instead of more combination for mismatched element levels, there could be a slight damage increase for existing towers using an element that was just upgraded. Maybe for free, maybe not. (Example, if you have a hydro tower build, and then you get Earth LVL2, the tower would remain the same, but get a bit of a damage bonus).

There is a vote mode at game setup to determine game settings. What I am suggesting is a mode where a new vote made throughout the game every 5 levels for which element you would like to have out next.

I would like to see two additions to the game play modes 1) Add a vote for element mode. In the round before a new random element is unleashed, have the remaining players vote. Votes not made before time is up are ignored. Not sure how you would handle sell back rate on this, if it would be %100 or %75, or something in between. 2) A mode where when creatures reach the end of the track, they do not respawn in your area, but in the next, so that the whole map becomes a big circle. This would make it work similar to the DemonCircle TD, if you have played that. Game would end when a certain number of creeps are still alive in game for all players.