This guy gets it.
I'm a SMN main, trust me when I say learn to position and rely on your pet better. I've gotten Carbuncle cleaved multiple times because I forgot to pull it back after M/F charges in O12S and the O11S tank buster way too many times. Why? Bahamut resummons. Learn to place your pet before each battle and Heel it when you want to follow you. The fact that the fairy is an independent entity actually winds up being a massive benefit. Especially in ARR where you can actually get by not casting a single healing spell with proper use of Whispering Dawn and Rouse, and once you get Deploy you get the ability to get double shield value out of your Succor by utilizing her. The only time I ever really have to cast Succor in ARR is when I know back to back AoE is involved in a trial. You can leave people at half health then prep for the next AoE with another Succor in dungeons. Once you have Indom (which is literally level 52) you're set for every single instance afterward. Hell I did a re-level on SCH just to see if it was a gear issue and it wasn't. The only time I had to cast Physick remotely close to the manner you're referring to was during Brayflox, and it wasn't even bad compared to what I had to do on WHM and AST.
Adlo is 600 potency, 300 heal + 300 Shield. Not 300 potency divided into a heal and shield, and that shield portion is doubled on a crit. It's weaker than Cure/Benefic II because it's a shield. It's for mitigation purposes first, throughput second.