Monk doesn't gain anything from TA unless your subbing a job with an active TA job trait.

As for DA, I'm still uncertain, monk is built upon STR, it eats STR to make it what it is, and if I can get more damage per attack, I'd much rather do that as the mob has less chance to gain TP, unlike through more, less powerfull attacks from me.

Even with a decent subtle blow % on my monk, I'd still much rather kill the mob in less attacks than more.