Is there any particularly good way to fight Jotunheim's Moose Riders? [CBM 1.94]

[jBrereton]

Sorry for the wordy title, but aye, as the thread title suggests, I've been having huge amounts of trouble killing off these troublesome units.

Stacks of hitpoints, a very solid mêlée attack, and two shortbows conspire to make them a pretty deadly threat, all things considered.

I've noticed that their morale is only about average, but with their reasonable protection, I'm not having all that much luck with the typical spells I'd use to ruin archers (blade wind, etc.), and building up the kind of mass panic/terror etc. force is certainly easier said than done

Any tips? (playing MA Ulm in single-player if this is particularly important information)