Why does Sage punish you for using your healing spells?

[Nethereal]

But the potency of Toxicon means that anytime I try to prepare Toxicon, I end up leaking damage because I had to use GCDs on Eukrasian Diagnosis (diagnoses? lol).

Did they change how Eukrasia works while I was away? Enhancing your spells is not a dps loss it equates to a regular GCD.
Eukrasia is a 1 second GCD recast with the spells it effects being 1.5 second recasts making it a regular 2.5 recast like any other spell.

The main issue is their generation being a DPS loss more often than not.

Correct me if I'm wrong but their generation is only a dps loss if you were to run out of mana because of generating them otherwise they're dps neutral.
2 targets being a dps gain.

But just generating them is the same as simply using a regular GCD except it costs you more mana which isn't a loss until you run out which shouldn't happen unless a lot of people are dying.

Edit: I think I know why it's a dps loss now gunna recheck the posts later.