Stun = 25 MP every 23 seconds
Aspir = 10 MP every 30 seconds
Sleep = 19 MP every 20 seconds
Bind = 8 MP every 25 seconds
This is roughly the order I prioritize the spells in, and roughly how often you can use them if chain-casting. Refresh alone covers Stun and nothing else. With Refresh and Ballad II, you get to spam the hell out of them whenever you aren't sitting on a shadow.
A max-haste NIN with a Ballad is getting hate a hell of a lot faster than one relying on enmity gear and a couple of spells.
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