You can do 4k+ DMG every 45 seconds and you already have 5min duration buffs if you take the time to hit 420 skill(not hard) which pushes most of the buffs up to 5 minutes with a few at 3 and 4 minute durations. If you really want to be buff happy you can juggle Hastega, Crimson Howl, Inferno Howl, and say Noctoshield every 3 minutes in addition to giving a fairly decent double attack buff from idling with Ifrit out. Since you're probably in Abyssea you can easily have a strong enough refresh to keep those buffs up and use Meteor Strike every 45 seconds if you're good about using Elemental Siphon and have a half decent perp set.

Or you can toss cures while coming close to 1 shotting mobs which takes less effort and people won't complain if that's all you do.