System specs:
6x EVGA 1080ti SC Black
2x 1000w EVGA G3
ASUS z270-P
4GB RAM
G440
SSD-120GB

Power is free (don't mind running them pretty good)
Mining ZCASH using DSTM miner

1. I am trying to find the optimal OC settings for these cards, while stable. I've heard to try and OC each card individually. How can I do this in afterburner and save the profile, so that on a reboot all of the cards use those individual settings? It seems like in afterburner, when you individually OC the cards, the profile does not save for all cards, only one.

2. Does anyone have any OC settings for these cards so I can baseline off of?

3. The 3 GPUS at the end of my rig are a lot hotter than the others. (these cards just spit the hot exhaust above and get sucked into the ones after it) What is the best way to Exhaust some heat away? Put a fan above the rig and exhaust the hot air upwards? Or blow cool air towards the front of the rig(the front of the cards).

Thanks!!