I would try the CC mamba monster 2200Kv/4S 25/90 gearing, with 80% punch control and 6 timing, that should be smooth and should run as cool as can be ^^ The only cons is the additionnal motor weight ;)
The solution of desesperate heating problems is always bigger motors
Inferno VE MMv3 NEU-CC 1515/1Y 4S "Flying machine"