Seeing Red - A Complete Red Mage Guide

[Sacerdos]

Basically, swiftcasting or getting dualcast with a vercure will keep dualcasts in the right order and keep you from having to use jolt inbetween.
IMO, precasting Jolt as the opening spell isn't that bad of an idea either. If it's well-timed there's not much functional difference in any of these options.

When you open with a hardcast Verthunder/Veraero, your next cast is the opposite spell, then Swiftcast Verthunder/Veraero if you don't have a Verready proc for one of them, then Verfire/Verstone.

Acceleration -> Hardcast Verthunder -> Dualcast Veraero -> Swiftcast Aero if no Verstone proc -> Verfire -> Dualcast Verthunder-> Continue Hardcast/Dualcast rotation

At least that is my understanding of it. I don't see why Vercure is necessary, Verready procs are 30s duration and it isn't necessary to consume them right away, just make sure not to override procs.