In an overall confusing system, I tried this: http://i.imgur.com/dhV8h.jpg
And these were my results:
A mountain troll came in.
It was webbed, hit by the floor spikes, hit by my maze, stunned, hit by the stoning lance or whatever is the name of the weapon of my sorceress companion, hit by archers with fire and dwarf bombs.
Yielded combo = 0
Can someone yield light on my utter confusion?