Endoperez said:
Drain 2 shouldn't be any worse than Drain 1, so you could've had one more scale somewhere. There's at least one report of Drain being bugged, however.
I havnt noticed that any time ive taken drain 2 either. Its only (non-buggy) problem is tiring your mages out faster (and with your bes mages being so old that can be a problem)