[DFFOO JP][Kain IW Lufenia+]Mog in Lufenia+ w/ Kain and Ursula
2Mog has been my sole cleanser since I started playing JP when BT+ came along before Balthier LD appeared. Didn't put him into much use other than backwards clearing past content before so I tried him out here.
Mog:
When you think about it, Mog's functionality fits this Lufenia+ perfectly. He is a ranged unit, he cleanses and heals and even has a low chance of putting confusion and stopping the bosses from doing anything. The thing that has been hindering him is his DPT. Now with a friend Fran, a Jack call and Ursula, he can be put right back into the action. You can even throw some magic burst unit like CoD in for like 3 turns and use Fran instead of Kain, because Fran can do 200k+ on both targets now and Mog has lightning imperil, so that you can use Ramuh to boost mBRV for Ursula to be more effective (no brothers because boss absorbs Earth).
Kain:
Ursula also has a nice interaction with Kain other than offering generic stat buffs like Brv damage up and overflow. She can instantly set Kain's current Brv to mBRV (+more) before he takes off, negating the ramp up time you need for Kain in the air normally. So I refrained from taking off for one turn once he reached 4 stacks after LD. (I messed up once in the middle of the fight and dumped all Kain's BRV in a launch, wasting an additional S2 from Ursula lol)
Also, since Kain deletes his own turn, you can put more valuable CAs on him like Sazh LDCA and Cait Sith LDCA to hold them for a longer period of time. I considered taking off his speed passives, but Ursula would have burnt out even faster, so I left them in here.
Other ideas:
Another range unit that can cleanse for subbing in Mog would be Balthier with a regen call like Cait Sith. He would do more damage and provide more mBRV for Ursula and other stat buffs for the party. Similarly, Prompto having party HP regen on his LD can have a cleanse CA for this to work.