Flash>CoS>Flash>Rampart>Flash>Flash>Flash>Fast Blade>Flash>Riot Blade>Flash>Fast Blade>Riot Blade>Flash> then FB/RB the fight HP spiders tossing in a flash when they can. They should make sure they have at least enough MP to toss 3 flashes in the next phase and 2 in the phase after, then they need a full MP bar for phase 4.

They either need some more experience holding AE hate in general or they are not managing their MP well.