Math guys / SE guys:

Can anyone provide a quick number crunch on how many creatures or pseudocreatures (lingering souls, combat walkers, fetchlands with dryad arbor) you would want to run in order to justify 2 Diabolic Intents, such that they are live ~90% of the time before turn 5 or so?

I think it's going to end up somewhere around 24ish, but I'd like some actual number crunching to back up my assumption.

If it's too complex of a question, by all means ignore me! Just figured I'd ask.