Assuming we get the one that gives either 200 or 250 atk for 120 int, will it be better? I tried playing around with the calc and it doesn't seem to do any better than tengu set whether the weapon is a crimson mace (low watk) or a hurricane fury (high watk).
The only possible benefit (?) I see is a free lower headgear slot. Are there any possible lower headgears around (possible or already-existing onese) that could make seraphim worth it?