The main reason I'm putting off an Ember-respec is that I don't really know what to respec into if I did. Never played Arcanist before so could be that, but I'm not going to do Brown-Fur because it honestly looks like it breaks the game, lol.
I would not recommend arcanist if you're not going brown fur, the arcanist archetype for wizard is better (and more fun I think: wizards scale really well with the mythic casting feats for infinite slots). The basic arcane tricks in general are super disappointing, except for the +DC/CL one, which is insane.
Most people in this thread seemed to think I'd really miss having a Cleric. My original plan was to keep her as a Shaman.
I think you should have a full progression divine caster. Cleric has some nice domains but honestly shaman works imo, as long as you pick good spirits.
I just did Nenio's quest and honestly, having Greater Invis was such great QoL... not only does it prevent MC-one shots, it also fixes his TH problems before getting Demon.
True sight becomes very common on enemies later on. Wizards have some decent buffs, but honestly the hex that forces opponents to roll twice to hit you is probably the best defensive asset in the game.