I have not had any trouble at all with cooling. I have ~81 C on the Hotspot with 1.0 on the voltage and 80% fans. Remember that this GPU is designed to hit 110+ C before it throttles, unlike most recent gen GPUs that will throttle around 83-84 C by default.
Most of us don't feel comfortable running the GPU at >80C for long periods of time regardless of whether it throttles or not. This is why I am satisfied with just 81 mhs.