I think the best thing to cope with movement would be to just like Fire/Blizzard IV refresh Astral Fire. That is the mechanic I struggle the most with, that makes fights frustrating, and would put blm back to where it was. Enochian I feel is neat and can be fun to race the clock with as you only have to refresh it twice before you can restart.

Astral Fire is the real limiter and what feels awful to combat. Before movement meant we lost the spell, but we could just restart again as its very rare to have to move for ten whole seconds. It gives more breathing room for handling mechanics and lets us pick up casting whenever we can. It would mean replacing Fire 1 but given how this expansion has issues with skill bloat, I don't see that as a bad thing.

Black Mage is a class I liked because of its simplicity which is gone now. As it is while firing off Fire IVs can be fun, when things go wrong, they go very wrong and it doesn't feel like the old black mage but a different class.