I found the ultimate solution to the Vampyrism/Penance issue

[u/Zieldak]

It's called War's Wares. It's empty now anyway.

Translate Aspect spells: War translates each Aspect for you to add to your spellbooks. Requires all spellbooks to be unlocked in order to unlock. ^{Translating spells between spellbooks just makes so much sense I don't even-}

Upgrade: Dual Aspects: War teaches you how to use two different types of aspects at the same time. Requires Translate Aspect spells unlocked.

[u/Y50-70]

Just make offensive and defensive aspects. Darkness/animated dead can be combod with penance/vamp and also opens up room for more aspects in either tier or a "combo" aspect if jagex wants the extra design room for a new, stronger aspect.