Pretty much, but you don't want your green mage to also heal. I had problem with Rikku/marie, so I had to sub Rikku for just healing. Could probably sub marie for healing and rely on hypernullall instead. But relying on her for both was impossible for me. WoL's rotation of provoke, light is with us, armor buster was critical.
If you have non-elemental dmg (Ashe, ace, alterna, enhanced ultimas ). They are the best.
I, personally, did not even try for the five man team. Just doubled on DPS to focus on getting that 15 turn (and it still took 13 turns.