Stranges magic would make this team FAR too powerful. I think Deathstroke, Doom, and Prometheus are great masters of prep and have interesting abilities to complement each other.
They get 1 days prep by the way.
LP
long pigRestricted
ohhhh, prep. I think that's where I got lost.
Slade isn't on the same league as these guys, he's more street level.
But, since Doom is there, with prep he moidalizes 'em.