This one might be the easiest one. Since the scheme has Assault, you basically just have to ready a couple of times and it's like killing a minion with 8-10 HP. You get to pick the side scheme, so it will usually be something that's no big deal to leave out if you are going to take another turn to finish it, or you can get a bad one out of the way if the effects on it aren't currently a big deal.
The big question is ... what happens if there is no such minions in the villain deck.
Did this fail? Did this get resolved without effort? Took a minions with 5 hp? 4 if no 5 , then 3 ...
Seems one design oversight.
List of minions from modular sets that are non-elite and have at least 6 hit points(as of Hercules Hero pack release):
A new leadership staple for Avenger heroes. FFG has done a great job limiting card advantage up to this point. Spiritual Meditation and Espionage both break even at plus 0. Strength In Numbers is awkward to use since it requires not only playing several allies but opting not to use them for a turn. "Bring It!" is also fairly restrictive requiring you to accumulate minions which in turn requires careful deck building and/or select heroes. And Taunt often wastes more advantage than it gains due to the villain attacking you. “Avenge Me” requires no extra set-up and results in a plus one card advantage just for chump blocking or consequential damage defeat. “That’s a plus one!”
For the raw cost of the card, the Scarlet Witch is incredibly efficient. The Forced Response upon playing her, however, is potentially devastating.
The best places to use the Scarlet Witch are with heroes who can scout the encounter deck and know what the next card is going to be before playing her. Spider-Woman, Falcon, and Gambit come to mind.