It supports the standard Ni/Ti/SS316L and has a TCR mode for everything else. It's not DNA TC quality by any means, but works quite well now the new firmware allows you to lock the resistance.
I had a hard time finding something to run on my Aegis, it's sweet spot is around 50W-60W for any battery life. So I picked up a Geekvape Zeus, it's a single coil OBS Engine nano style RTA, except the Zeus works perfectly where the nano was a struggle for me just to get a mediocre vape.
I think you will get great runtime with the FeV. I use an Aspire 26650 4300mAh in mine and have tried 18650's, 20700's and the junk iJoy 21700 which gave the worst performance out of all batteries tried.