Simulator & Spellcaster
Thing is, that's only a race-like choice, not a class-like choice. It's a small, static thing. To use the description SMHWorlds did, background to my mind fits "what I apprenticed to do".Isn't that what the backgrounds are for in 5e? That's why they fill out the character roleplaying bits with traits, bonds, ideals, and flaws plus some skill and tool proficiencies plus a background feature that is very much a non-combat ability.