For Novus, and I assume Nexus, Det beats Crit because it's a 1-for-1 situation.

For other gear situations, I would rate them about equally (in the uneven ratio typically found on gear).

One interesting note is that i90 crafted gear is more efficient way to gain STR than the 30 point respec. Suppose you're a full i110 tank with VIT jewelry and 30 bonus points in VIT: Respec trades 30 Vit for 30 Str, but replacing all 5 jewelry pieces with i90 pentamelds trades 30 Vit for 65 Str (ignoring secondary stats).

Regarding parry: How far are you willing to lower your defense in order to up offense? Personally, I like tanking the hardest content out there, so I keep a lot in parry. Switching to Crit/Det in some situations would be respectable.