I am going to put all my NVidia machines on X17, Neoscrypt, Tribus, and Xevan only for a few days and see how it goes =)
Are you still mining just these 4? Its been 4-5 days, are you still convinced this is a better solution? Are you using ZPool?
Others have mentioned modifying a -m multiplier value, do you yourself do this and what values do you use for six 1070 GPUs?
Still at 180 interval?