You get a pretty good MH+OH caster non-spirit combo with two entry-level bosses in this tier (Magmaw - Incineratus and Halfus - Book of Binding Will). Considering that you can enchant your OH with 40int, I'd stop looking for that staff right now and start farming those two bosses =)

Heck, even the PvP MH + Halfus OH is potentially better than that staff.

I'm talking from a Warlock PoV, but I bet that's true for mages as well.

When Cataclysm came out, my goal was to get the staff to help out with raiding with my guild. So I did it almost everyday for a good while, for all the time while my queue fired off for 40 minutes.

4 months later, I got both a main hand and an offhand from raiding, and still no staff in sight. I hate Archaeology.

I'm aware there are decent MH/OH combos for casters. I'm using one now.

That isn't the point, however. I want a staff, have a single option to get one, and have to dedicate a big portion of my game-time to getting it, so much time that, by the time I can get it, I probably won't need it. :(

I wouldn't consider a BoA twink staff such a bad deal.

twink staff? There are heirlooms for that, if you want one. The Dwarf staff from archaeology is ilvl 359 and requires level 85.