Ifrit is meant to be a challenge. It caters to casual players because it is repeatable with minimal wait in between and getting the items to enter it are easily mass farmable.

I apologize if I sound stand-offish, but casual should be more about accessibility/being able to actually attempt the event rather than difficulty. Having done it a few times, the fight is very doable with some practice even with a sensible group (2-3 healers, tank, dds). You have to work together with your group and the ability to retry the fight relatively quickly means you can get quite a bit of practice in a short amount of time. My LS is mostly weekend only and this sort of challenge is a breath of fresh air and the kind of content we need. I'm assuming you haven't been able to try the hyper mode fight looking at your job levels, but check it out when you can and practice it a few times.

Coming from FF11 where failing a fight means you have to wait 3 days at best and weeks/months at worst to re-attempt it, I am enjoying learning fights a lot more in this game and a lot of things are intuitive enough for you to learn how to deal with them through practice with a good group.