Anyone else having difficulty with Leblanc?

I'm still in chapter 1 of FFX-2, I'm doing the Chateau Leblanc mission and the three of them are kicking my ass. I have Rikku/White Mage to start out and get rid of the Guard, Yuna & Paine/Warriors so I can Sentinel the first triple attack they do and minimize the damage, and then after that I switch to having Yuna/Gunner Rikku/Festivals and Paine/BlackMage.

I make it to the second random Guard and it all goes downhill after that.

I'm trying to target Logos first as he has a lower defense (i think) and his RussianRoulette attack is a major problem for me, but even using Chocobo Feathers I'm having difficulties doing any REAL damage to them and its really infuriating... advice?