What weapon to use pre raid??

Right now I have the staff from ZG and a MH/OH combo from just regular heroics. The MH/OH have more int than the staff, should I use that instead?? Or is there a better weapon that drops in zg/za that would be better??

Basically trying to decide what I want to put power torrent on. I am mostly using arcane now, but I have specs for both arcane and fire and plan to use both.
The 353 staff *should* end up with a higher amount of SP and secondary stats than 346 MH/OH Combo

Can you post which you are choosing between?
http://www.wowhead.com/item=56357
http://www.wowhead.com/item=57923

I have the off hand from beauty too if that would be better.
quick maths says go with the staff:

338 Int on your MH/OH combo (counting enchant) vs 323 Int on the staff BUT:

1729 SP on MH/OH and 1849 SP on staff. Int is the best stat for mages, but the high disparity between the SP on the two options and the low difference of Int makes the staff a better choice.

Alternatively, though, you could consider going for the ZA Dagger ( http://www.wowhead.com/item=69591 ). With the dagger, you would have the higher amount of Int (346 in this case) and SP at the trade off of diminished secondary stats (since the only 353 OH I saw was a spirit one from ZG)