You'll be fine on BLM. Just takes practice and WHEN you lose Enochian, you understand why, and what you can do in the future to prevent it.

On another note, all dps is like this. Dragon has to keep up Blood of the Dragon, Ninja has Huton, monk > greased lightning, SMN > dreadwyrm trance, Brd has a ton of dots to focus on keeping up, etc. each class becomes more difficult at level 60, but none of them are really that bad once younger the hang of it.