I'm starting to wonder if the Niefelheim theme isn't the worst choice for Jotunheim. Consider this:
(1) For the same price you can pick 'Heart of Winter' which is very beneficial to your dominion. This is also true for 'Ceremonial Faith' (if you use cheap human priests preachers) and 'Restless Worshippers' (if you can stand a bit of turmoil).
(2) For 25 points less you can pick the 'Utgard' them which gives you the cheap and dreaded Seithkona.
(3) If you want to play with uber-bless effects, 3 Woodsmen cost the same as a Niefel Giant, get slightly worse stats (except prot which is much worse), but get 50% more combined hp.
(4) The Niefel Jarl isn't a better mage than the Skratti or the Gygja (actually much worse cost-wise), and on the battlefield its best use seems to be the 'cast quickness/attack' routine. Sure he gets the chill aura and better stats than the Jotun Herse, but is it enough to justify the cost difference? 8 Herses cost 20 gp less, get you 3.5x more hp, 4x more attacks, equal or better protection, lesser morale (but it won't be an issue when blessed or berserked), lesser MR (but 8 times more MR checks to fail), lesser defense (but 8 times more targets to overcome).
Considering all this, I'd be tempted to pick nature 4 (for the berserk effect) and, hum, what else? Water 9 would be nice, but there's always the possibility to give Boots of Quickness to your better Herses at some point, and the defense bonus (especially with berserk on top of it) won't help much wrt the ganging effect. Nature 9, great, but you can forge Rings of Regen easily, ditto with Wraith/Hell swords (these don't don't help to reduce afflictions, but they give health back faster than nature-9 regen or rings). Astral 9, OK, but you can forge Rings of AM even more easily. Fire, cool, but the Herses can dish a lot of damage already. Earth, damn, they already get 18+ protection, and won't even need reinvig if you equip them with Wraith/Hell swords (which you can forge easily). Blood, then? They already have gobs of strength. Death, maybe? Their soulless Version isn't impressive enough to warrant the cost, and the lesser fear aura isn't that great. That leaves Air - which, considering the Herses' susceptibility to crossbows and lightning, seems the most versatile way to go, as your national mages have no proficiency in air magic.
What about
:
Dominion: Heart of Winter, strength 6
Virtue - Air 9/Nature 4
Cold +3
Leaves 123 points to tune the remaining to your liking.
Or, if you plan to produce Hell Swords en masse (and therefore, don't need the nature 4):
Dominion: Utgard, strength 6
Virtue - Air 9
Cold +3
Order +3 (the Utgard theme requires order +1 at least, so why not go the whole route)
Leaves 120 points for extra goodies. At least perfectionnists will have the satisfaction of spending every available design point.
