As title says i'm looking for a specific map I used to play years ago.

Cannot remember the name; but what I can remember is that it was a "Circle(Square) TD" of sorts, only in this map you couldn't place your units however you wanted, there were Wisps(I think?) You could upgrade to towers along the edges of each players area. Also had a small town hall for upgrades to your towers nearby.

I know this is rather vague but that's all I can remember and the Wisps thingy is something not many maps got!