Time to bring back 1.23 multi-job relic style dungeons

[Magis]

Needed is not the correct word, you are not restricted from the content simply because you don't have one ability. More like it is less efficient to not have it.

I'd say that Swiftcast is "needed" for WHM if you are doing raids. Your chances to raise players are shot except for rare "breaks", and you lose an important "oh shit" button.