Looks like 2.9e on 6 GTX-1070 is less profitable then 2.8c.

My params are the following

-nvidia -cdm 2 -cdmport 3333 -cdmpass -minRigSpeed 188 -rmode 2 -tstop 65 -tstart 40

PM 2.8c gives me 191.65MH and costs 750W (1MH costs 3.913W)
PM 2.9e gives me 192.5MH and costs 760W (1MH costs 3.948W)

It is not critical, of course, but...

Good news: PM 2.9e provides more stable hashrate then PM 2.8c or any Claymore or any Ethminer.
I have 0 stale shares during 1:25 (1 hour, 25 minutes).