Roll Again is really good

[Matt]

Roll Again allowed me to breeze through the second half of the game. The sticker merchant was selling it one day, so I purchased 15 copies and slapped them on my monsters, while making sure they also had a 0 AP move to use repeatedly (like spit or smack). Each Roll Again gives an independent chance to attack, so even weak moves can add an additional 90+ base damage per turn, per party member. Not relying on stronger moves also allowed me to set up some monsters as batteries with AP Factory, so my partner could crank out 4 AP moves every turn.

[TwilightDusk]

Spit/Smack, AP Factory, and then 6 Roll Again stickers does sound like a pretty hilarious build.

[Matt]

You can also get a strong tank buster build with multiple AP Refund stickers. If you spend say 2 AP and you have 5 Refund Stickers, there's a chance to refund that 2 AP five times, maxing out your AP for a Last Rites/Headshot. It's even better if you slap on an Automation so the 10AP moves sometimes trigger randomly for free.

[Matt]

I'm loving the combos you can make with this game.

[Fortuna]

A thing to be wary of with Roll Again however - Roll Again triggers after you attempt to record a monster for a turn. So if you fail a recording, the monster becomes vulnerable to dying to any Roll Again attacks.

I've seen a couple of people lamenting this because Roll Again killed bootlegs they were trying to get.

[UmaiCake]

Besides Roll Again, being able to stack multiple procs of any passive seems really OP.
I think Random Starter is actually better than Roll Again since it procs at the beginning of turn, e.g.
Last Rites/AP Factory/Random Starter x 6
Pre-emptive Strike being another pretty egregious one...