I meant an AoE version of that "line" meant for a solo BLM. Comet obviously isn't AoE. Meteor obviously isn't for a solo BLM either.
The Ja spells function the same as comet and are AoE. The might not be the damage type you want, but the point is these spells are AoE and can be used solo and have the "successive use enhances potency" on them.