Unless the loop spins twice?
Once it starts looping it doesn’t stop often. Alchemist + Hellcat is the best infinite loop.
I did some stats somewhere about running that team non-stop for a week. It’s both fast and pretty unstoppable if there’s no freeze or drain on the other side.
Many players find such loop teams a bit slow - indeed you do have to spend time looking at the board and can’t just mash out explosions. But I’ve been using such loops full-time for three years (or whenever Hellcat was released) and weirdly I see the next colour swap in milliseconds. I see them in my sleep now…