ItemSet 376378
Would be my pick. Gives up a bit of yamarang's stats, but gets you enough DW for delay cap. Not sure why daggers are backwards, don't feel like messing with it. Maybe consider dropping one moonlight for d.ring, which'd give you capped DT with a DT-5 cape.
Given you already have the Gandrings, I wouldn't rule out offhanding a second one over Twashtar either. The accuracy and HP are nice, and the remaining TH+ will be helpful in capping TH as well.
The w2 bosses are 10 minute fights on MNK, with less buffs than you have. They are likely shorter with your setup, so you should prioritize survivability options over damage.. your buffs and malignance on their own are going to make the fight short enough to not be a concern.