Original post was actually 106 watts - all of my 1070 ti cards right now are set in the 104-106 range to allow the rig to hit my "6 amp draw" target.
 Anywhere from 100 to 110 watts has given very similar efficiency, though 104 *seems* to be the sweet spot by a hair.

 +200 +700 has stood up so far as "best" for the clock settings - higher = unstable rig, lower loses a little hashrate.

 Keep in mind that my sample size is still pretty small - a few EVGA SC models and one Zotec Mini, though I DID just get a MSI Turbo card in that will be going into my next "rig rebuild" project probably tomorrow.