Now, my first feelings were to try BW delirium, as both Sorin and Mindwrack Demon are of course good cards, plus Kindly Stranger and Tooth Collector are good delirium cards. I get a little bit of removal in Angelic Purge and Puncturing Light, as well as some neat tricks and the ever impressive Always Watching.
My next brew went to BR madness/delirum with all seven of the vampires of I have - not sure if enough to capitalize on the Stromkirks and Aristocraft - splashing Sorin. This also gets the notable Breakneck Rider, as well as Fiery Temper, Spiteful Motives, and some draw. I suppose Goldnight Castigator is also worth mentioning.
Still going through options and I think I'll try laying out UW or UB with the Sorin splash next. The green in the pool is not impressive from my glance, which is disappointing given I have two green dual-landed.