Durability item crit effects?

Do the crit effects from durability items stack with natural crits/SE/etc, or are they a separate bonus chance and damage boost?

Of course they stack, silly.

Makes a clean inferna stronger than my 151 att crossbow at horntail, lol xP

Makes a clean inferna stronger than my 151 att crossbow at horntail, lol xP

And if the cost to refill its durability was less, it would be worth it.

Makes a clean inferna stronger than my 151 att crossbow at horntail, lol xP

Is he a reptilian (or whatever type gets boosted by inferna)?

Was there a durability claw? From the dragon rider PQ, I mean.

Was there a durability claw? From the dragon rider PQ, I mean.

Not that can be seen in the Evan patch extractions (when the weapons came).

Is he a reptilian (or whatever type gets boosted by inferna)?

Yeah.

Was there a durability claw? From the dragon rider PQ, I mean.

Yeah there is, it's called Crypto and was added in an earlier patch.

In this case the only items I can think of that still outperform durability crit items are ArchMage/Evan Elemental Weapons, yes?

They may be not SO great for classes without natural crit (though with critical rings and SE they should ammount to a decent boost, thorns too). They would be bossing weapons then.