WIth both Flare and Torchlight, Ulf is ready to fight the lurching opponents with Battle Axe and Shield.
He knows Jorunds plans a Berserk charge , but will stand his ground (and hold his own Berserk) for the moment, especially if Ivar is rebuking Undead.
Osvald is staying behind Ulf, ready to cast, and hoping one of his spells will help (sadly many are not effective v Undead).