Minion stack is another deck where you need to be careful of bad reshuffles.
Examples:
T8 or so, 1 cards in deck and hand: Gold, Silver, Copper, witch, witch.
Playing double witch big money, as the witch causes a re shuffle, don't play it.
Same deck T8 0 cards in deck
Hand: Witch, Silver, Silver, Copper, Curse
Borderline but I think I would play witch, (hoping for a copper to get to Gold).
Same deck T8 0 cards in deck
Hand Witch, Copper, Curse, Estate, Estate
Should play witch no question.
Obviously lots of space between the extremes.
But I think the biggest lesson to learn is to think about reshuffles before you play actions.
The details will develop over time.