I'd like to recommend :
Plant exlosives: titania (claim jump with Killjoy, other scheme depending on opponents crew)
Turf war: dreamer (every scheme is quite good for his crew), maybe take widow weaver with you
Reckoning: pandora (schemes claim jump with Serena or Candy, assassinate or vendetta depending on the opponents crew)
Highly recommended versatile models in every crew: Serena, maybe Doppelgänger if you want to drop scheme marker while engaged, Tuco.. Yes I really like him (stealth, blasts) particularly in the Dreamer and pandora crew, Iggy. Iggy you must take him, do it ( deny scheming for the opponent)
Dont's: Sorrows