4 speed is almost unforgivable. nora mine better be one of those upgrade options ^^. Dark healing is acceptable.
Assimilate? hmm... possible but not really effective but flavorful at least. Acolyte: magic or Psychic? Perhaps. A lot of good magic sources but psychic allows it to trigger with itself. Soul Channeling? total bomb with soultap base unless it was somehow compensated for the bad synergy of having to pay for the two abilities. Not easy with one being on upgrade. Logistics life siphon would be sweet! Kinda fits with the theme of the more spirits come in the more buildup powerful they become. Also with it splitting that actually is pretty interesting as it requires more deploys to trigger the newly split champ. My vote is Logistics: Life Siphon somewhere in that upgrade path.
I'm also liking the fact that you can double your Detect coverage for any sneaky side font plays. In the preview video i remember Sok saying that it would have some kind of relocation ability so maybe that is on upgrades. I guess it's supposed to just sit in a font replicating though. I quite like the idea of it.