This was even with Caravans before, since i wanted to "put all eggs in a basket :D "

I removed Caravans because i still need to trigger 24 more so i decided to put brooms.

The most important thing to rise the chance of triggering Party Up! Ach is to play and let die Devouring Ectoplasm BEFORE jamming Party Up!

More info here: https://outof.cards/forums/hearthstone/hearthstone-general/8683-achievement-hunting-forged-in-the-barrens-edition?page=4#comment-184641