With Vespera looping on yellow with 4+s isn’t at all a problem, and the boards left behind often have over a dozen yellows. So each cast of the Sun would basically be a freebie.
The question to me is: is there any situation where it is worth buffing life and gaining statuses over having a second Finesse for greater damage output? I’m not sure
I guess I’ll try it out for fun, maybe, next time there’s a yellow delve. But for now there’s no content in the game where this team, even if interesting to think about, is actually useful to me, since I’m done with delves, have better (faster) explore teams, and use Soul teams most other “daily chore” places to be able to afford pinning medals to troops.