Quote Originally Posted by MicahZerrshia View Post
All 4 nails? We never take out more than 1 and with either sentinal or stoneskin you never have to worry about dying. Plus if can time yourself right you can second wind and/or start casting cure before he even hits the ground and have urself at near 100% hp before he does any other move. And positioning shouldnt be messed up since you really shouldnt have to move at all for hellfire. I think you overcomplicate the nails a bit, but everyone has their own play style
Sometimes people screw up their hellfire-prep. For example, you think Ifrit's jumping to the centre, so you use Sentinel, then proceed to watch him do dashes for the next 15 seconds before hellfire.

2 nails is certainly not essential, but makes things safer.