Which critical ring is better for me?

EDIT: Now that I've been ninja'd, I recall either hadriel or Grey having a table with relevant critical, maybe minimum critical data. I don't remember where it is now though.

It's specifically for DB, but the math is posted, so one should be able to adapt it to a different class (the big difference being that DBs practically have 100% crit already, so there wasn't really a need to do a weighted average for average damage): http://www.southperry.net/showthread.php...ost1181162