As a concept, I probably would not play it but would be happy that it is in the game.

It took me awhile to figure out the basic loop because I was trying to translate it as button presses so I kept going back up to cross reference it, haha.

If I'm reading everything right, this sage has two three-step combos, with the third step being Eukrasia'd second step, which also needs the second step buff from the opposite combo on top of following after its own second step...? So 1 2 1 3 x3 1 3 1 2 x2 1(finisher).

Yeah, it is a good thing that Rhizomata exists on this particular build; the buffs being on a strict timer when played well is... awkward, and I wonder how strong the primary buffs should be, given that they both are a "Regen" and a buff to use in response to mechanics.

Besides that everything is fine, though I wonder about aesthetics. Particularly the aesthetics of the rotation. You mentioned the four humors, but it never feels like you are building up to it? It is probably a nitpick for a theoretical class that I'm not sure I'll gel with, so that that with a grain of salt.

One thing I would love to see; what is the level 50 toolkit? The essentials of the essentials. Even though this job starts at 70, an early level that feels good is still important.