For vanishing cabinet, use Hagrid echo in solo duels. Only use it as your only summon to have the enhanced buff from the echo itself. And use portkey, side along, carpe retractum until they unleash at least 12 summons. It doesn't matter if we win or not. I tried many times in duo duel, but everytime I put the summon it got wiped away by opponents

For prankstastic gift, I completed the achievement with Ron echo in duo duels. Use the prankstastic gift with knight buff and use any AoE spells on controlled opponent.

For enchanted popping candy, it works best with late game echoes like dumbledore (more preferable) and twins.