So, they both will come to the shop soon. Its a guess but probably first Yale&oliver will come then Phantasio.
I love both of them. However, I dont have their introns and the builds I have for them suck. There's been no umbro contents nowadays (please umbro needs some love), and there's no pyro character I like to play except for Yale&Oliver, of course (Hilda will one of my faves once she gets released). And to be honest, I'm lazy. Only my lumino and electro characters are well-built. Lumino because I love each lumino character but most importantly my man Kezhou.
This is my current build for them. I can't invest further because I have 20 secret letter clues. I'll contiue investing into their builds later.
2 scorch&2 blaze*morale, prime*morale, w.i., wildfire and i.s. (just for the skill intensity buff) for phantasio. I don't plan to change this build until umbro gets better wedges.
Now, for Yale&Oliver... I don't have any tracks right now, so this build below will change a bit. Instead of volition, I'll put a blaze*eternity once I have +10 inferno&devouring wildfire. I'm aware of Yale&Oliver don't scale with skill duration. But I don't have energy to invest into 4 same wedges to +10. I didn't even bother to max 4 lumino scorches out for Kezhou.
I'd like to build Berenica, too, her gameplay is so cool. But she has to wait until I'm done with Phantasio.
Its a shame that pyro wedges suck. Umbro wedges aren't the best, too, but at least somehow better than pyro. I hope we'll have some decent pyro wedges on Hilda's release.

Kielos
Hilda saving Pyro and Camilla saving Umbro.🙏🤤 Mommy supremacy.
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Phantasio will be available in the shop from May?
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Is yale and Oliver good, what is he a support or dps? I don't have him.
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So I'll have to wait another two months for Psyche to be available in the shop