Iv started on my second charecter a necromancer not long ago and while the playstyle is notably diffrent from my warrior the real issue If found is under water combat.
While your meele underwater is well balanced a necromancers ranged weapon the trient is like a bad joke.
Iv found that necros and probly other forms of spell casters have a huge disadvantage under water. Necros cant take hits as well so range is a key factor to surviving but the trident does like no damage. At lvl 62 my tridents crimson tide. (its main atack) does 32 damage. I understand that necromancers are more effect baced but realy only 32 damage.
Iv found it more benificial to use the spear and get close taking all of the damage from nearby enemies. I believe triednts main attack for necros needs a major rebuff. It should be least 5 if not 10 times as powerful as it is. Theres no reason for a weapon of that level to do such little damage.