[P3D]

EA Vanheim?

Take EA Helheim, throw away the Helkarls/Valkyries and Death Magic access, replace the capital-only mages with one having one less magic path (A3B1? vs. A2D3?, E3? vs. E2D2?). What you get in exchange is extra Supplies in dominion (Fey Boar) and a dual-wielding berserking infantry that is also cap-only.
At least you have guaranteed E3/E4 access which is not bad for the buffs.
You could use most of the tactics described in the Helheim guide as you have the same access to air and Earth magic (and more to the latter). Your blood access is marginally better (B2 randoms) and you have guaranteed A3 with A4 (and lucky A5) randoms for Thunderstrike spam - the same air access as Caelum.

Mind you, the +5 berserking gets you to 18 attack skill and 24/25 damage but 7 or so defense without bless, you don't really need fire weapons unless facing ethereal troops, and they'd deal enough damage to pop Mistform. So they'd get hit and would be much less durable.

What about an imprisoned Dom6 Enchantress with say O2S3C3D2L1M0, A1E9S9N4. Your Vanhere's protection would be 16 (20 with legions of Steel) you automatically ignore two hits and you encumbrance is reduced to 3 (5 in Cold-3), and Twist Fate remains longer in melee. Get one scale for Dom-5.
Monolith would give you one better scale with above bless at Dom-6.

The E9 bless would also help your Vanadrotts and Vanjarls with fatigue.

All this CBM.
In CBM quills are lvl 0, you might need them.
You have Dwarven Elder multiheroes too, with some big research bonus and more magic, IIRC.