Arurf Needs to buff the rift too
Firstly, can the fountain give like, tripple the current healing? You can spawn and get killed before taking a step. No, that's not a joke. It happened. A lot.
Seconldy, can towers do twice the damage? Maybe even ramp it up as the game progresses? Dives don't last very long in arurf and frankly towers don't do much to defend you even at level 3.