Coyote as in Native American, not Warner Bros.
I actually may have a build skeleton in mind. It mostly involves using Psycarnum Infusion and Midnight Metamagic to get really high level Shadow Magic spells off the ground early -- a trick I am totally stealing from an old thread. The idea is basically you expend your focus via Psycarnum Infusion to count your Midnight Metamagic as having max essentia into Heighten Spell, which gives you something like 3 free Heighten levels at level 13. So, you're summoning bigger, badder things than usual, which makes up for the lack of a Malconvoker's multi-summoning. At least that's the theory.
My problem is figuring out what else to do with the build. It's Base 5ish (Sorcerer, Beguiler, or Wizard)/Shadowcraft Mage 5, and ...
I have no idea what else. My spells will be real enough b/c they'll be high level, so I don't need any more shadowy stuff, and I have no idea what else synergizes with this idea. Anything that would (a) boost summoning, (b) keep with a sneaky or deceptive theme, and (c) not really lose caster levels would be attractive.