Dunlending Ravager duration

[Air Power]

"Assignment: Spot an ally to make that ally participate in skirmishes and assign this minion to skirmish that ally."

This card doesn't explicitly define when the ally stops participating in skirmishes.  My guess is until the regroup phase, because that parallels SotLHH, SSotG, HoB, and OWMWF, but I'm not sure.

So if there is another minion which is fierce and the ally survives the skirmish, can the ally be assigned to the fierce skirmish?

And if the ally survives, and the FP moves again in the same turn, does the ally still participate in skirmishes?

[bibfortuna25]

Unless otherwise specified, all phase actions last until the end of the phase where the action is used. So if the ally survives (and the Ravager is not himself fierce), the ally can't fight any fierce minions.

[Air Power]

Unless otherwise specified, all phase actions last until the end of the phase where the action is used. So if the ally survives (and the Ravager is not himself fierce), the ally can't fight any fierce minions.

Thanks!