Necro vs thief tactic
Day walker, night stalker…
Stun/daze/fear, apply some conditions or damage he should be low hp or dead By then. Only problem is if he can force you on defensive. Usually some extra bleeds etc. will kill him when he goes stealth if he’s not careful.
Also always carry STAFF. Just spam AoE where ever you think he could be.
In WvW it’s tricky because he can always run, you can not, so there’s no way to be sure you can get him.
Guardian 80 Necromancer 80 Ranger 80 Mesmer 80 Elementalist 80 Warrior 80