ToME: the Tales of Maj'Eyal

It struck me as very odd that summoned demons aren't affected by the Blighted Summoning prodigy. It makes good sense mechanically and thematically to give them blight bonuses. Some already use vim abilities anyway. How viable would it be to patch the Ashes of Uhr'Rok DLC to reflect that? I know that Necromancy+ already tweaked it for necro minions. For that matter, how exactly does the demon seed mechanic differ from other summoning methods codewise?

you cannot corrupt the corruption itself. unless you had another corruption.... but you don't. its both blight.

Sure you can! They're constantly looking to improve themselves, the better to bring torment to Eyal. You wouldn't be doing anything they don't already subject themselves to.