Mesmer or Necromancer?
I don’t understand the people that think Necro’s are underpowered. They’re overpowered, imo.
Mesmers are a different story-great in PvP, lacking in PvE. So it really depends on what you’re interested in.
Im with you on mesmers needing adjustments but necromancers are a very powerful addition to a team right now. WvWvW dungeon and structured you bring a ton of utility. Wells are probably my favorite ability set in the game when traited up. Well of Suffering on a keep wall will keep everyone away, follow it with Well of Darkness , Reapers Mark etc. you can really punish people trying to use anything other than siege weapons for defending.
In a dungeon you can grab the plague form elite and use the blind on it to effectively remove some of the most frustrating trash packs from the game and the AoE you bring to DEs with the staff is very good as well . I’d suggest Necro, they’re a lot more useful in anything other than structured where mesmers almost definitely have an edge. Even still structured is enjoyable for a necro as well.