Theoretical scenario is a very apt description because this requires Nino to have +4 buffs on all stats including Resistance (which isn't going to happen on defense teams) and Odin being +4 buffed in his own stats, which requires at least two team mates to use up their turn.
Overall you are adding 16 stats to Odin and removing 16 from Nino - in order to portray this Odin build as viable you are using a deviation of 32 stat points from their normal states.
Yes, this is a theoretically possible calculation, but in practice it is meaningless.
I have personally advocated for Odin to move up into a tier with Henry because I believe he is not worse than him. However, with the arrival of Cancel Affinity, the TA Raven build falls apart. Odin compares unfavorably to practically every other blue mage as a Blarblade user so he will stay in the lowest tier in the next update.
In practice, the +4 to all of Odin's stats is easy to get. The -4 to all of Nino's? Little trickier and dependent on the enemy composition, but the only one Odin actually needs to jank out a win against her is Res. That's it. One Res buff from her allies converted to a debuff and she dies to a blue. Shouldn't be possible, but it can happen. Even if she doesn't get the necessary Res buff to die, the matchup's still a 50:50. A shit unit should not be getting a 50:50 in a 'disadvantaged' matchup.
Now, there's the possibility of, say, Blue Tomebreaker to fuck with things hard against Odin or her using Life and Death -and- not getting the Atk and Spd buffs, but 1) no green uses Blue Tomebreaker and 2) she is -totally- getting those Atk and Spd buffs. What kind of -blade-oriented comp doesn't have those buffs?
-
I am not arguing he's S+++, but I do think he's better than C-tier.
He's a friggin' mage. Give a bad non-mage all the buffs in the world and they'd still be bad because those buffs ain't fixing their flaws. Give Odin all the buffs and his one flaw's fixed because -blade tomes are stupid like that. I mean look at those buffed stats. You could look at...idk, a buffed Gray (who's A-tier) and they'd actually be pretty comparable because again, -blade tomes are stupid like that.
Now, if we're talking Henry, I don't friggin' know. >.> Buffs and a -blade tome can fix his Atk, but that Spd ain't getting fixed. Have the guy written off because he's guaranteed to get doubled by just about everything.