Originally Posted by
Kuwagami
it doesn't. With that said, since crit has a non-null base value for a tank, unlike DH, you'll get more consistency from more crit than from adding DH imo.
I may very well be wrong, but the only thing that would change is the order of melds, making tenacity and DH more desirable than crit. And since the trade-off of tenacity vs DH is neglictible, you would rather meld more tenacity for the increased survivability. Which would leave the choice between DH and crit only on the few pieces not capped in tenacity