Well, swapping weapons removes TP, so...
Printable View
Pretty much just stay in the same staff. It's not like there's a whole bunch of minmax options to choose from like back when elemental staves were in vogue. Whatever your best magic attack bonus staff is, it's probably also your best magic accuracy one, so really the only tough choice is the 25 magic accuracy on kaja/khonsu grip or the 5 mab on niobid.
Now, if you're doing /nin to double-fist wands instead, that's pretty much taking myrkr off the table entirely. If you pack every possible piece of occult acumen and store TP available to black mage, you can just, just barely hit a build where you can come out ahead on MP that way, but we're talking like spend 800 to get 1000 back; it's not really practical to switch sets to soak up that little bit of recovery.
Add emote to make BLM jump up and down with fireworks, totally fixes basic mechanics...