Shareeravadi +2 Or Varuna's Staff +2

I though i'd do some trials staff when i get a decent gear blm and here it come, then i watch wiki and i found out Ice staff 2 "specials" staff...didnt though the choice was hard but just in case...
Wich Ice you'd choose ?

And whats exactly diff between mag attack and mag dmg ? w

Shar +2:
INT +9 Magic Attack Bonus +12

Varu+2
mag acc +1
mag dmg +5

In case of Varuna's Staff +2, <Element here>: DMG+1 is equal to the MAB you'd get from an NQ elemental (Lv.51) Staff. DMG+3 is (iirc) 1.2 more than an HQ elemental staff. So with Shareeravadi +2 you'd only get the INT and MAB+11 Which is far less than you'd get from doing the dmg+ staff

Varuna's Staff +2.

...not even close HQ staffs are still better than the INT Shar +2

Umm correct me if I'm wrong but, arent HQ ele staffs teir 3 potency and macc? If so they still would make the best overall balanced staffs to work with if people don't have the patients to go for the trials...

Me and some LS mates haven been tryin to figure out the exact math on these for comparison. Any other insight would be appreciated.

http://wiki.ffxiclopedia.org/wiki/Magic_Affinity

Bonuses are reported in tiers, rather than direct increases.

NQ Elemental staves, such as the Thunder Staff, grant Affinity +1 as a hidden effect.
HQ Elemental staves, such as the Jupiter's Staff, grant Affinity +2 as a hidden effect.

Magian staves directly say +3/4/5


Tier 1 m.dmg +10% m.acc+20 avatar perp -2
tier 2 m.dmg +15% m.acc+30 avatar perp -3
tier 3 m.dmg +20% m.acc+40 avatar perp -4
Tier 4 m.dmg+25% m.acc+50 avatar perp -5
Tier 5 m.dmg+30% m.acc+60 avatar perp -6

EDIT: conversly, they give the same numerical values but of the opposite direction (?) if using the opposing element.