Best materia for MCH

Just got MCH to 60 recently I'm still pretty new to the job but I'm little confused as to what would be the best options to use as far as materia for MCH.
I read a lot of info on these forums some people say that CRIT is useless because while gauss barrel is active it won't matter, others say this is completely un true and to stick with CRIT and other say DET is the best.
Could anyone help me out or show me a link to what kind of gear you may be wearing on MCH that is melded. Thanks guys/gals!

All Crit > Det > Acc, unless you aren't accuracy capped with food in which case you put Acc where you would put Det.

http://na.finalfantasyxiv.com/lodest...acter/8977134/

Aiurily is a pretty bloody fantastic MCH and that's his/her gear.