Try a 0.2 layer. I find the thinner layers have more tendency to curl or otherwise have issue with heat when on an overhang.
Also you can try to point the bow more directly at the fan outlet.
Lower bed temps as much as possible and also extruder temp.
Sometimes using a raft with 1 or 2 layers that is a fair amount larger than the perimeter of the model can shield the lower overhangs of the model from bed heat a bit.