I've been running the E30 race maps for a few days. I've found that with my hardware(VRSF DPs, ETS FMIC, DCI) a mix consistent with about E35 (mix of E85 and Shell vPower 99 in Sweden) works best. With E30 it was a bit aggressive but E35 works very well.
The biggest issue for me with 6MT is the shift BOG/throttle closure (from high boost?!) and post shift corrections. I believe these are known issues but have sent logs to Cobb.
VD calculates about 430 whp with my setup and the car pulls great.
Edit: STFT will have great variance for a while after switching fuel while ECU gets used to environment.