Is this build still good for PvE?
For PvE, not much as changed in Scepter/Dagger, except that Dragon’s Tooth is outright bugged as a Blast Finisher now, reducing Might stacking, and will be a little harder to use for that purpose even when fixed.
That said, in PvE, I don’t see the need for Signet of Earth. I also use alternatives to Arcane Power, since when the full burst is off cooldown things die quickly anyway. And the idea of not having Arcane Wave in that build is … strange.
Scepter/Dagger is, more than ever, a PBAoE configuration. Almost all your big hitters either are PBAoE, or should be used at point-blank range in your Ring of Fire for Might stacking. And the exception, Fire Grab, has short range itself.