-Update-
So after a day or so, I have to admit it's a bit faster than 1.20. For version 1.20, Consistently I've been getting maybe 11-13 mh/s on the 1070s upwards to about 15 mh/s on the 1070ti.
With ver1.22 I'm getting 13-15 mh/s on the 1070s and upwards up to 15-20 mh/s on the 1070ti and these are all undervoltage to about 67%.
Total hash output is 58-84 mh/s on version 1.20 and total hash output on 1.22 is anywhere from 64-110 mh/s. Of course with x16r it's very unpredictable but I haven't had any crashes yet on Mint 19 with nvidia 390.48 drivers + Cuda 9.1 and I'm pretty happy with the results, thanks Dk & Zealot/Enemy good stuff!
What is your TDP?
My average temperature for all 4 gpu's on average is around 59-64 celsius. 2 of them are set @ 60% fan speed and the rest are automatic. For intensity I have all of them at -i 21 without any issues whatsoever. I'm really liking 1.22 more than 1.20 now. One of these days I'm gonna try a headless server setup because Mint 19 seems a bit bloated for my tastes but the easability for installation is a breeze!