I use sp-mod #1 (0.05btc)  and get 40 mhash++ with full tdp in the lux algo on the 1080ti. If you don't have enough power, you just add a few 1080ti cards, and fill the empty slots with 1060 cards.

I still don't yunderstand why ppl spend $900 on a 1080ti card, and limit the power and use shitty opensource  software and mine at 28MHASH. When they can buy the sp-mod and mine with the lowcost 1070ti at the same speed.