Result of 5 x 1070 Ti tuned rig (PL=120W, OC=200/1200):

With EWBF the hash rate is 233 sol/s at max. 64 °C GPU temperature.
Watching the nvidia-smi table I realized that the GPU usage switches between 98% and 100% with miniZ miner.
EWBF solved this issue in v0.5, GPU usage stays always at 100%.
Hope, that helps for improving your miniZ.