that graph is a bit off.. its closer to 14 crit =1% according to HOURS of in game testing.

No-one can touch a bards crit, right now in my gear i average 33-35% crit in coil. BLM do not get a great deal of crit on their gear so getting much beyond the 5% base is hard to do. skill speed by the math proves to be a better stat. Crit in this game is also only 150% normal damage so dropping you cast time 7%(easy to do) will return more damage then upping crit when you look at what is out there as far as mage gear.