Balancing Chained Stunnings

To offset to a subtle degree the capacity to chain-stun someone when Demigods are travelling in a group, apply a -1 second penalty (cumulative) to the duration of the new stun ability, per existing stun effect.

Example: Player A is stunned. He is struck by another Rook boulder which would normally freeze him for 3 seconds. Now, that boulder only stuns him for 2 seconds. Before either stun effect dissipates, a Torch-Bearer moves in and freezes Player A. -2 seconds is deducted from the duration of the Torch-Bearer`s stun effect, since it is built on top of 2 pre-existing stun effects.

I don`t want to see cooperation be thwarted by the introduction of some arbitrary anti-stun mechanic... if players are smart enough to juggle such effects, good for them. I could however see the above mechanism being applied to simply offset the effectiveness of the tactic.