[Snake]

That could be abusable with Fruit of Fluidity.

As for Amalgama in general, I would rather just give them a completely new interaction with Sanctity that simulates a better use of their Formidable passive. They're essentially spirit dolls anyway.

"There is also a Scaled SAN% + Scaled LUC% chance, while you are possessed by spirits, that damage higher than your current HP will leave you at (Character LV) HP instead, but a random spirit will leave from your possession."