Me and a friend were trading summoner stories about all the changes and one thing we came back to was the loss of sustain and how it impacts using Titan specifically. Yes he's one of the most underused pets, but with all the leveling solo grind going on with the expansion I've been using him alot because ifrit and garuda either can't hold threat or die was too quickly.

Long story short, and grumbling/salt aside...we came up with at least something that would alleviate the pet healing issue:

Have Physick use your INT stat for the purposes of healing your pet. Simple as that. It could just be a trait, or something unique to a summoner's version of the skill. Egi are tied to INT for their attack damage anyway, so why not have them be affected by your physick in the same fashion? Lore-wise it would make sense...a summoner understands an egi's aetherical structure better then anyone and could heal them much more potently but still be terrible at healing non-egi targets.