I don't have too much issue regarding Kardia, except I was hoping all Sage's dps to Kardion target did not just heal, but also provide a minor barrier.
For example, halved the current cure potency and apply minor barrier on the other half potency for Phlegma, Dyskrasia and Toxikon.
What I personally would like to see more is Eukrasia upgrades.
Eukrasia currently only upgrades Diagnosis (healing), Prognosis (healing) and Dosis (DoT). This is an awesome design and I believe it what makes Sage unique. This upgrade can be further explored to upgrade other abilities in the utility department. I believe SE will definitely introduce them in the next expansion. Here are my versions.
Phlegma upgraded to Eukrasian Phlegma
Eukrasian Phlegma spreads your primary target with Eukrasian Dosis to all nearby enemies and refreshing its timer.
You can do this every 45 seconds with 2 charges while you are in melee range which makes sense.
Icarus upgraded to Eukrasian Icarus
Rush to a target enemy's or party's location. Create a barrier to the target and everyone you passed through.
Barrier potency: 200
Very niche however you are able to rush to protect all party members you pass through by doing some positionals between yourself and the party into stacking phase
Holos upgraded to Eukrasian Holos
Cure potency: 150
Reduces damage taken by self and nearby party members by 20%
This version trades healing for a stronger party wide mitigation
Toxikon upgraded to Eukrasian Toxikon
Requires 3 Addersting to use Eukrasian Toxikon. Instant cast and cost no mana.
Create holograms Milpreves (4 floaties) to continously cast Toxikon three times on your target.
Instead of pressing Toxikon each time off GCD, this allow you to expand all at once in situations where you require dishing out continuous minor heals while you cast other spells.
At the moment there is no other reason to use Toxikon outside instant cast moving phase and it does not cost mana. This give us a better reason to stack 3 Addersting and reward us for this function.