So mastermind cards say that he always control a set of villains i.e Loki always control Asgaard villains..my app always give me different villain groups....should i use those or go with what the mastermind card tells me ??In Solo games Masterminds can lead any Villain group. This is so that players can experience all the Villain groups in solo play. It's in the rulebook for the Solo Setup section if you want to double check.
Also, don't forget to only use three of the henchmen cards, not all 10!