Solmyr, Demeer, and Aislin are cheaters (and/or) kamikazes; do the rest have a right to exist?

I can perfectly imagine Gosh without any buffs, trust me. Firstly, you need to find him. Secondly, to learn a spell from someone, the target needs to have a certain level of intelligence, and the caster needs to have a higher level of wisdom to teach that spell. Therefore, if the spell is level 4, it requires expert intelligence and advanced wisdom. And thirdly, even if that were the case, it's unlikely that a Necromancer would focus on gaining wisdom in the first 3-5 levels; they would be leveling up their Necromancy skill. And even at level 6, I doubt they would prioritize wisdom.