Sadge, the battle seems desperate for our heros.
on a more serious note, then how the hell do we win? we clearely don't have a way of beating actual demi-gods, the queen alone has power rivalling an incubus and no apparent weakeness. hell she even has infinite res. so she's arguabely more broken. and the battle doesn't stop there, since it was hinted humanity will fight a battle on two fronts. ie angels and succubi. with the risk of antagonising incubi in the process
I'll not answer so I will not spoil the story hahahaha
But this I can say, because it's no problem for the story: The queen is not as powerful as the incubus. A few posts ago I explain the power level.
The queen will be like a top tier mage with insanely powerful relics (from a human perspective), but an Incubus would be a demi god, creator of said relics.
Succubi maintain their rulership not by power alone, but by connections, relics, influence, competence, generals serving her, etc.
Here, the power level:
Lesser Succubi - novice mages (can cast a few lesser spells)
Succubi - apprentice mages (can cast at least one powerful spell and have some minor spells)
Generals - adept mages (have a few powerful spells and a relatively powerful relic to help them)
Duchesses - expert mages (Have multiple powerful spells and multiple relics to power them up)
Queen/Royal Succubi/ - master mages (They know unique spells and have unique artefacts that could be considered legendary items/spells)
Incubi/Void Clan/Epsilons - demigods (They are creators/discoverers of new world-changing spells and can give blessings/power to their followers/worshipers)