Summoner is so confusing for this returning player

[Rongway]

Eventually (Lv86) you'll gain Favors for each elemental summon and will need to add those new actions to your rotation: a two GCD instant gap closer and follow up for Ifrit, a GCD AoE puddle for Garuda, and four woven oGCD attacks for Titan. At that point, your filler Ruin IIIs will drop from 4/min down to just 1/min.

Use your Ruin IV from energy drain when you best see fit but not during a egi window, Cast Ruin III untill Trance is off CD

Ruin IV during a Demi summon is a loss, but it's okay to use Ruin IV for movement during an elemental summon (most likely Ifrit, since Garuda and Titan both use instant Gemshine/Brilliance anyway).