Post by Eledhwen
Look at this.
http://www.wow-heroes.com/hitcalculator.php Does all the calcs for the %'s that asakawa gave you.
Ah, that was what I was looking for! Basically the magic number is 368 so I regemmed for spellpower (not crit, though one of my gems has both) and gained 46 spellpower while getting 377 hit, which gives me a bit of breathing room too.