I don't think you need frags on both bar you'll get enough procs through crushing shock but that's just me. You'll need an execute so use endless fury, it's an awesome execute. With that said you can replace frags on your back bar with harness or deadric mines. This is my destro setup.
Destro:
1) Frags
2) Curse
3) Endless fury
4) Crushing shock (this is a better morph for pvp the interrupt is awesome)
5) Surge
Ult: Dawnbreaker
Resto:
1) Deadric mines
2) Harness
3) Hardened ward
4) Healing ward
5) BoL or streak
Ult: Meteor or atro
I sometimes swap out mines or harness for proxy det but since you're vet 1 don't worry about this.
Hope this helped out