Yeah... I'm gonna go ahead and guess that Drain II won't be as strong as Drain, seeing that Drain is already very potent if geared right and using the Phalanx/Phalanx II as comparison.
I'd be surprised if Drain II could do more than 300, because then that's just overpowering.
Again, what's with the job adjustments for jobs that have already been adjusted and improved so many times in the past few updates, and that nobody's complaining about anymore? Give the other jobs that haven't been touched (and some of them are *still* waiting to be fixed) some attention.
