Sustain

[Officer_Cat]

Depending on how the MT moves for lightning markers, Ifrit will be hit with them fairly often. In O3S along with dragon phase, ifrit can be hit with books and magic hammers in library as well as reaper charges.
If you don't see a reason for it, then don't use it, but a lot of people clearly do.

Thats things where you can move your pet
Adjusting, and you are fine.

Sustain makes Summoner life way to easy in my eyes.