I do feel sort of bad that paladins get the blame if a group wipes on Ifrit (hard). It's because offtank paladins literally have one job -- stunning. I remember the days when people actually had to avoid eruptions... and they didn't have to rely on a paladin to constantly interrupt them. I originally avoided interruptions when I saw them (in 2.0) but then my linkshell paladin teased me and said I have 'no faith'. So, I started standing still... Buuuut, if he messed up or lagged or someone else stunned making Ifrit 'immune'? I was probably dead.
I wish Ifrit had more mechanics than just stun bot. The healers and dps have it really easy compared to the person who has to literally sit there and WAIT for an ability or the whole group wipes. DPS and even healers can drop and the fight can still progress -- but if the paladin messes up? Oh, well that's a problem. I have a feeling that this fight was intended to be won without so many stuns -- or SE assumed that people with stuns would 'take turns' during a stun order (if you join DF with two warriors, they usually switch off while one main tanks). When paladins were allowed to have a nearly instant stun, that is when they started turning into stunbot.