Your gear is good, maybe swap the reason belt to a 46 legendary one.

Make sure you've nekro.

Skills:

Aim: 5/5
Packs:5/5
Sp:4/5 (Not the last one)
Nox:4/5 (Not the second upgrade)

Passives:
Armor: 5/5
Crit: 5/5
Damage: 5/5
Agility: 5/5
Knowledge: 5/5
Might: 5/5

I'm not sure if that adds up to 51 but that's the best for pvp.

If there's extra put it in nox mastery.