I used SoL before, too. With avenger to reduce the counter festival at the bat wave. It was ok, but the team lost at least once, so I changed to virus and his passive disable helps. Thing is, I want to have a reliable auto team and one (as Muzze said) that is also capable to do the weekly one, so I always use the 3* team - so I only need to remember that one team. You are right that locking the team would be great and helpful (for all dungeons by the way!!).