New skill.

Tile Master: Places a single tower tile to any water tile. Requires lvl 100. Max skill points: 4 Level 4: Obtained at the beginning of run. Level 3: Obtained after surviving round 25. Level 2: Obtained after surviving round 100. Level 1: Obtained after surviving round 175.

I'd rather not see the maps changed like this since the number of neighboring towers is often part of the map's balance.

Yeah imagine the sudden-widened synergy that support towers can make. Its a lil nerf for Obed users like me though.