1. What content are you doing? What sort of players are you playing with? By all metrics, Red Mages do some of the lowest dps when compared to practically every other job when played at a high level.

2. Embolden isn't as good as you think it is. BRD has 3 buffs that are of an equal to or greater Raid DPS contribution. Dragoons have two that are equal to or greater. Ninjas and Machinists each have one that is up to three times more powerful excluding damage mitigation and threat tools. All of which do much more damage than a Red Mage.

3. The greatest asset a RDM provides is it's ability to chain raise a party. Assuming you've gotten to the point where no raises are needed, the RDM desirability plummets like a rock. Obviously, if a player is a good Red Mage and a mediocre anything else, it's probably better for them to play a Red Mage; however, that RDM ought to consider expanding their horizons and try new jobs.

Your rotation priority ought to be Dualcast Proc Thunder/Aero > Stone/Fire > Impact > Swiftcast + Thunder/Aero > Jolt. The whole gameplay loop for RDM is to cast Jolt as little as possible and only use it as an activator for Dualcast or Impact and rely on procs to start your dualcast chains. More of this is found here.