[DFFOO JP][Ursula Lufenia+]Snow version
As per request by a comment, here is the Snow version.
Already established that Y'shtola's interaction with Snow is really good (in fact she is really good with all the characters in the Machina block). I believe the main draw for Ursula other than the batteries to Snow would be the party HP damage up and Gain mBRV overflow. Effect of her Brv lock at min 20% mBRV is less significant to Snow because Snow mostly refunds his Brv anyways. Overall, his damage potential is really high even at just normal HA.
Another thing that Ursula "helps" Snow is, indirectly, the drastic SPD down that allows Snow to sometimes have 2 turns before the boss moves. So you can sneak in a LD use, bump that stack to 2 and have a revenge mode+ follow-up before they move to avoid wasting that additional stack. It is a minor thing but it is a strat that you can use to your advantage. Sadly, since it always revert back to 1 stack, c65 stack will only grant you an additional 1 stack follow-up. I have yet to find a way to achieve 2 stack spam.
For this run though, Snow will take care of the boss's attacks and the orb. Practically speaking unless you neglect shaving their BRV for far too long, there is little risk and health management to deal with when Snow is here.
You can expect me to use Snow in Divine Ifrit because he is my only ice unit available, that may change if there is additional ice unit released with the event though, maybe OK BT+ or something.
Also, something that I noticed about Snow is, he could be the last "tank" archtype character to receive a LD, in terms of existing characters anyway. Of the remaining 30 LD-less characters, unless they convert someone like Cyan into a tank much like what they did to Auron, you may have to think about pulling Snow just in case.
On a side note, it seems FF4 music is flagging copywrite left and right, so I may record with no music whatever something FF4 comes out next time lol.