Just an idea. I think it would simplify things a bit..

Trance phases have two buttons for single target and AOE
Summon phases have two more buttons for single target and AOE.

Except for Ruin III, the opposite phase's buttons are dead half the time (Gemshine and Precious Brilliance are dead in trances, and Tri-Disaster is dead during summons. Ruin III is active during summon, but there's little reason to use it then.

I suggest combining these 4 buttons into two, which work in both trance and summon phases. This way, there's no need to switch back and forth, as well as cleaning up the interface a bit.

The single target button will switch between:
Ruin III No phase
Astral Impulse Bahamut trance
Fountain of Fire Phoenix trance
R, E, T Rite Summon phases

The AOE button will switch between:
Tri-Disaster No phase
Astral Flare Bahamut trance
Brand of Purgatory Phoenix trance
R, E, T Catastrophe Summon phases.