This is gonna sound dumb, but one of the biggest things for me to get used to was having a mindset of always having Eukrasia on. At least until are comfortable enough without it on and can sneak in some Diosis dps. Worst case will probably be able to use your AoE dps..but even then just throw a shield on someone then spam dps away. Or poison the target.

The big gimmick of Eukrasia is the ability to move and cast at the same time, with some forethought needed to “get it ready” beforehand.

Your base healing should use the addergall stones if at all possible. Really you should only really using the hard-cast heals when everything else is out, and hard-casting diosis when you know you’re good not to heal/shield for a bit.