Since as Casters we barely do any casting, I think it will be interesting if we have a "Cast phase" then a "Mobility phase" for our rotation, given that the Summon's Favor - where our attacks change to the summons element- is granted at the "Cast phase" but can be activated during the " Mobility phase", it will go like this:
1. In the casting phase, we summon ifrit/Garuda/titan back to back as a hard cast, afterwards, we insta summon Baha/Phnx/SolBaha similar to what we have now.
2. After the Casting phase comes the mobility phase, where we activate the Summon's Favor at any order we want and execute attacks on the move until we go back to summoning again.

For more variety, the summoning roster can change between each casting phase between (ifrit/gauda/titan) and (levi/Ramuh/Shiva).