Yeah it's crafting only.
*looks at the first post*
Oh he wants both. Well for leveling idk, best case is Bargest probably but Savage Species states they use class progression when controlled by a PC, but a little DM lenience could go a long way. I suppose you could aim for a sort of level-less play. Like a limited Pun-Pun or something, aim to progress and collect things independent of leveling. Obtaining Spell/Powers as an Erudite, or Supernatural Abilities using Ability Rip, or people using Dominate, or Undead controlled through umbrellas (my slave controls other slaves who control other slaves), etc. Maybe you don't get new spell level, but you always get new shines and become more powerful.