Dat staff.

I forgot exactly how fast BaMs gets with Advanced Yellow Aura but I know a fast staff is better than a slow just with that. The question is if inner potential -1 att speed would put you on the same level as a fast weapon if you use say an empress staff? In that case I don't think you'd do a good deal with that one.

Slow Staves put me at 1 below speed cap I think, an Elemental staff would bring me to cap. I've tested it with my Dragon Staff (slow) and my level 103 elemental staff.
While it is possible that the inner ability would get me to speed cap... I hate azwan, I can barely get to honor level 20, never mind 60 and even then the chances of me getting the ability is very very rare.