Which method of bonus calculation do you use for multiple people?
For instance:
Joe, in AT20, falls off a 20' cliff, survives, but breaks an arm and a leg.
The remaining party of 4 PCs tosses down a rope which he ties under his arms.
GM decides it's an extremely hard maneuver for one person to drag Joe in his AT20 up the cliff face, and that every round he's being dragged, he takes 10 hits of damage from having his broken bones ground on the cliff. .
The other 3 players pitch in to help the strongest player. . .which method do you use to take account for their participation. Do you reduce the difficulty of the MM, Allow them to add all or part of their bonus to the MM, both?