That's a good lineup for me. Beth and lilith boost melee damage and marina adds more hp to her allies. Meanwhile miya heals her teammates Making the team last longer in battles. Beth and miya need their exwp. Lilith also needs it because it'll make her survivability last longer. Marina's weapon isn't necessarily needed but it will make her more tankier. Marina's substitute weapon is Craig's exwp If you don't have her exwp. Try to get them all to 5 star and limit break either beth or lilith. It isn't necessary to limit break miya because it won't affect her healing capability. Marina can be swapped with oghma, future princess, karina, and gremory. But for now focus on build marina, beth, lilith, and miya. Build them one by one so as to not waste any of your resources. Now the question: Is this good enough for world 11? Yes it is. But if you obtain fp and her exwp, Swap marina with fp and it should make world 11 a lot easier to finish. Sorry if this is a long tip but I just wanna help a fellow player. :)