I thought 101DEX was one of the crit tiers against Mamool, assuming your mithra with unmerited DEX, i think you're sitting at 79, less for other races +5 from Rajas +15 from Byakko puts you at 99, depending on the meat you use (Coeurl subs add no DEX) you don't even break the lower tier, let alone 119. Personally i almost always use sushi on monk, i admit i don't have great gear for it mainly because i very VERY rarely use it for anything but i do have 8 H2H merits and still find accuracy to be an issue in alot of cases, i'd use a KO over SH, until i get a D.body if or when i decide to gear it again.
On a side note, if you asked me to pianimisso(sp) you a Madrigal while keeping March+Min and 2x Ballad on the mage, all while pulling, i'd tell you to go fuck yourself in no uncertain terms, BRD should be used to enhance other jobs, other jobs SHOULD NOT be dependant on a BRD to be able to pull there own weight. If there's 2 BRD in the pt, then maybe the BRD not pulling could be persuaded.