How do you meet the accuracy requirement for endgame raids?

[himym]

man i seriously dont know what to do crit/accuracy also seems weird because like....crit is so rng where as DET is more 100% right? so why do people favor crit so much....i mean when u do crit yeah its nice but how many are you going to crit, since u heavily invested so much on it vs DET where-as det is always good right? and fairy gets bigger heals, dots more dmg? UGHHh im about to meld my novus soon i cant decide im on T13 but 424? accuracy is kind of okay its decent enough for t12 i'd say that but i still miss quite a bit

DET/ACC/PIE max DET 31 / 34 pie / 10 accuracy ? finish product 35 det, 37 pie, 22 accuracy (base stat included)
CRIT/DET max crit 44 / 31 det > finish product 49 crit / 35 det?
CRIT/ACC max crit - 44 crit / 31 accuracy finish product > 49 crit / 44 accuracy (cause of the existing stat)
DET/ACC/CRIT - 30 accuracy / 35 det / 10 crit finish product > 49 accuracy / 35 det / 10 crit

i also see JP scholars do DET/PIE O_o whats up with that? more mana to spend on adlo? and bigger adlo with good dot damage right?