Can't say I disagree with it being a choice over "it just happens". I suppose I was wanting more of a Chloromancer type healer, stripping SGE of things like its HoT and Addersgall heals in place of healing by damage play style with buffs/debuffs you'd place on the party/enemy to achieve that.
Making Addersgall interact with Kardia wouldn't be a bad alternative. It'd certainly be more interesting than what it is now. If that's to be the case, what would you propose to in-classly (ew that's a horribly made up word) generate mana? For as crappy as Astrodyne is it IS a class based Lucid Dreaming and I wouldn't say no to seeing more of that (as long as its interactive of course, like ice stance in BLM... kinda, that also feels a bit forced but I digress).
And absolutely reduce Phlegma's cool down. Or... nah just reduce it. I have 0 ideas for Toxicon honestly. In an ideal world it being tied to shields wouldn't be a bad thing, because that would be how SGE "heals". Shield you up to soften the blow so Kardia heals can top you off and you'd gain the DPS abilities to do so. There'd be a point to it. I don't want it to be another Misery (where you use Addersgall to proc one). I'd LIKE to keep shield breaking as AN option to generate it, but I want more ways to do so that rewards the SGE for... something. I'm torn between saying good DPS vs good healing because if I say the latter it stays the same.
Anyway, using GNB as a model for it in some capacity would be nice. Maybe its weaker on the heals (not happening I bet) compared to its peers, but still gets the job done and has a fun rotation to boot.