Taking account of parser discrepancy and RNG you SMN does about the same as me around 395. CKD's SMN likely get multiple foes/mana due to 2 Bards, in addition to i115 book.

I not sure how many foe/mana you guys get, but I usually only get 1 Foe in the beginning and no mana unless our healer is fking up, so maybe that is why. Without bard help I dont think its possible to go 400+ especially with ifrit.