Yup. Tough cookie.
Hopefully you can spend the Quest token that takes away Maelgar's attack for one turn. Failing that, Ardenai has an "Acrobatic Dodge" that could send Maelgar to the Quest Area, canceling his ordinary attack. It's worth piling all your attacks onto Maelgar rather than his Undead buddies. But if Maelgar gets to do his thing then someone is going to take a LOT of pain.
I have the Valskyrr Campaign tabled out and I am 3 encounters completed of the first quest - The Abomination.
Using HoTM rules
This advice is welcomed, although I Have already gained 3 Encounters of rewards and no buried cards, spent a fair amount of resolve and have a pool of 7 Resolve, and most Heroes have only a few discarded cards. Gained Two Quest Tokens (A and C)