Maybe it's just me but the LightningAsic controller won't go much past 850 clock for me. The hash rate on the L.A. Controller is all over the shop in the U.I. so I'm using the hash rate at my pool (CoinShift) and it is reported in the 2900-3000 KHs range.  Using CGMiner with the gridseed drivers and individual clock settings from https://github.com/girnyau/cgminer-gc3355 I'm getting in the 3900-4000Khs range with an inconsequential number of hardware errors.  I will at some point set up individual frequencies on the miners and see what happens.  Don't want to lose 1Mhs for any extended length of time whilst trying for ROI on these units.

EDIT:
Just set the clock rates in L.A. Controller to be the same as the ones in CGminer and I'm getting 2700-2900 KHs