Sweet Combos

Today I came back to this game after not playing it for a year. My first run-through saw me with a Fire Bomb, a Teleporter and 2 Rockmen. It is such an unbelievably good combo to firebomb an important room, Rockmen right behind and quickly wipe out the crew.

I've played FTL for a few hundred hours and never thought to do this. Anyone else had some really niche but effective combos?