@everyone saying all summons need to be useful...

Let's say you summon Garuda and use her signature attack, the enemy becomes "Turbulent " (Air aspected 30sec DoT) therefore increasing Earth based attacks by 200% for single targets (Titan).
OR
Summon Ramuh for 150% damage but it's an aoe around the "Turbulent" target.

Basically Fire>Ice>Wind>Earth>Lightning>Water is a 200% single target rotation and Fire>Wind>Lightning is 150% aoe rotation
Ice>Water>Earth is a utility rotation.
Every time an element is hit by its affinity a dreadwyrm thing fills. Bahamuts* Actions deal 300% damage.
Only reason the % is so high is because it takes longer to summon them.