Okay so yeah, this is literally the first time I'm doing this with Pan at M6 so there is a miasmatic fuck ton of optimising to do but I genuinely now agree that he's better than Astra for Yixuan. Before I was inclined to say he's a weaker, although not by all that much, alternative-which is good too-but he's clearly the way to go.
Honestly, that's pretty great; had Yixuan required Astra I think I'd have thrown a bunch of crucifixes at her Buddhist (fat)-arse, now I feel like the devs used their brains proper like and made an already strong agent not dependent on Astra at all, not to mention her best stunner is still coming and maybe we'll get a S-rank sheer support for Yixuan too. In short, Pan's existence (at M6) basically made my opinion on Yixuan skyrocket.