Yes, that IS very important. The last thing you want to see when you join a raid is a def up on a boss that's not supposed to have it x.x
The demons buff themselves, too. Ult demon's normal OD is atk buff, raging OD is random 10 hits - you don't want the atk buff on a random 10 hit if you can help it. But it sounds like you're well prepared =)
My current wind team is Shingen, Cybele U, Frigg, Aether, Arianrod. Today I pulled Titania (+ fire 140%, but it realy doesn't matter in this situation). Is there a good reason to replace someone (Aether?) with her? It's a DMM so i don't have a single exceed weapon (I started too late). BTW, this team (+ Hrae) was made in 11 month of FTP play. On Nutaku I can't even dream about it.
Titania + Aether is $$
a quick question about anubis
her effect commensurate of dark is 100% without a dark grind? or she is = to the other 50% commensurate event girls
The base boost from Anubis when stating 100% Dark Attack is a base of 80% plus 4% per Dark Eidolon in your subs. There are 5 sub slots which will work to a full 20% when all 5 sub slots are filled with Dark Eidolon. (Your support main slot does not affect your Anubis and conversely when using an Anubis in support; only the sub slots can give you a bonus).
Each limit break adds 5% to the base value and doesn't affect the increase from Dark Eidolons in the sub slots (still 4% per Dark Eidolon in a sub slot).
Does this answer your question?
Dejnov.
Anubis is fine even without Dark sub-Eidolons, she's at 80% without any. Still way better than any alternative.
The 50% ones are awful because they're only decent when you can use a full set of sub-Eidolons without losing much Atk. Which is pretty much impossible.
EDIT:
This doesn't hold true for fluffy and Anubis as far as I know. A MLB Anubis is still 80% base, but gains 8% per sub-Eidolon instead.
The 5% increase in base happens for the 120% Eidolons though.