Herolover,
Deadlands is a very fun game, but I think the combat system is a little skimpy when compared to Hero. I tried to run it once and my players kept finding situations that just were not covered in the rules (possibly they were covered and my inexperience with said rule system caused me to overlook clarifications). Anyhow, the Huckster's EGO roll with side effects is a good idea. Possibly coupled with -3/4 Lim 2 RSR rolls (first one for minimum effect, say first 20 active points, second one for say, an extra 20 active points). If he failed them both, then the nasty side effect kicks in.
Just off the top of my head...