[Calahan]

I'm surprised nobody has suggested Rain yet, which is a nice spell for hurting Abysia if they are relying on anything to do with fire.

It's only Evo 2 and W2 requirements (1 gem), so 25% of your Bean Sidhe's can cast it. And it both doubles the fatigue for all fire spells, and helps cool those heat aura's down a bit.

If you can get to Const 6, then you can forge Water Bracelets (or maybe take a minor W4 bless and get Water Robes at Const4) which allows your Bean Sidhe's to cast both Grip of Winter in battles, and cast the remote spell Wolven Winter, both of which will hurt Abysia a lot. And cold is double hurt for those salamanders, as they have heat power that boosts stats in hot provinces, but that reverses in cold ones.

(also, a frost brand + elemental fortitude will make your thugs 100%CR, and so can ignore the effects of Grip of Winter, and the +2 fatigue penalty for fighting in a Cold 3 province if you've cast a few Wolven Winters)