[Finalgenesis]

Ah this is the ryujin mod nation you're up against. I see that 1.92 is also used.

Darkness as mentioned is a big one, and Val covered BE spells pretty well so I'll toss out some other options in whatever order they come in. I'm not sure what the new Jomon has spell access to so you'll have to prune whatever won't work =3.

If you have quickening, then you'd have manifest vitriol with easy national path access. While green lion's ethereal is negated by magic weapons, their AoE acid breath doesn't care about def or resistance. They're size 3 with 2x melee attack at att 14 too if they get engaged in melee though preferably they burn up their ammo first, quickening on them is glorious. You'd need to place them well tactically so they don't get engaged and fire their acid though (and it's not exactly long range), I'm sure you're expert on tactical placement so that won't be a problem.

Don't know if you have the research and access, but I could see gargoyle, treant, cyclop and maybe mechanical giant as good chasis in this case to gear up. Hell, if you have GoR capacity (pretender?) A Crusher would be a doable chasis with AoE weaponry and the usual defense. Anyway I'm sure you know more then I in terms of detailed SC/thug tactics with knowledge of enemy spell access so I won't go into the whole enemy MR spell counter counter, hold x5 stuff.

another option is mage archery, bane xbow has AoE 9, BoW is improved ...etc, and you have sacred self quickable mages. I think the ryujin can easily get enough A for mist though?

buffed lamia might also be decent, in particular a prot skin (marble warrior) with quicknening, size 2 double attack, life drain and 50% regen. Otherwise just use them as soul vortex battery for your bakemono sorc to keep up the spell barrage.

note green lion and lamia don't have DV, so if darkness is on the manual... I suppose lamia soul battery heh. Though most DV units you have access to are demonic/undead. I might segregate the armies into a night army (demons + undead) and magic (non DV summons) if tactically feasible and sensible given the situation.

Anyway, random, chaotic, sleepy ideas...