All this talk with Physick and Sustain, in all honesty, I have never, EVER used sustain, even back in the day when I was an ARC. On PS4, never had it on my hotbar.

If you NEED sustain to perform Solo, then you are doing it wrong. Also, Physick is just there for SCH, its a joke heal on SMN.

They dropped the spell that was least used by all SCH, SMN and ARCs. And that was Sustain.