Help with Decent Endgame Party Composition

Hi guys, I just came back to wakfu after years of hiatus. Lots of changes and trying to get myself updated to it. I'm currently playing with my friends and need some help with deciding our party composition. Our team consist of the following: Xelor, Feca, Eca, Sram, Sacrier, Masqueraider.

I was wondering if this is a good composition line up or do you think some of them should be swapped out for a Cra/Eni/Elio/Rogue/Osa etc? My concern is the survivability of the party. Sacrier probably could not last enough if there are no solid healers and Masqueraider is pretty soft and sometimes would only have enough to heal himself.

If possible, would not want to remove the classes Xelor, Eca and Feca but I am very open to suggestions though. (P.S it's more for a PvE oriented party composition)

Looking forward to get some constructive feedbacks from you guys!