What prof should I play now?
Mesmer!
Crafting or EoTM trains(are those still a thing?) would probably be the fastest
Mesmer is somewhat similar, as is elemental. (They are ‘spell-y’ and wear cloth, at least.)
Before you give up on your Necro, you could try some WvW or PvP. PvP is also a viable way to level a character, as all toons are leveled to 80 in structured PVP and you get level-up drops along the way, although it might get old if that’s the only way you level. The level-up items can be earned on your necro and used on another character, BTW.
Crafting can help you level to a point but might be expensive if you aren’t sitting on a bunch of mats or money.
All the professions are fairly unique so any would give you a different experience. Ranger is pretty painless to level. Guardian can be a little slow.
I’m in the same boat. Just “maxed” out my Necro, and did everything I ever wanted to do on it. I’m ready to move on, and undecided what class to play next… However, I have Zerk 80s of every class, so it’s just a matter deciding what to main.
Similiar to necro? Revenant with Mallyx legend.
Otherwise engineer as hes condi oriented just like necro