Valkyrie Overkills

It's all about hitting the minions so hard that the villain suffers. Prioritize the Hand Cannon over Valkyrie's Spear. Try to put down Dragonfang and Combat Training asap.

Pair up with a good thwarting hero for better results!

Also, remember that Chooser of the Slain and Angela don't reveal the minion, so prioritize bringing out minions with nasty effects to dispatch them before they cause harm later on the villain's phase