Wow, Lesser Restoration is really effective on this. Inconvenient how Shavri suspects it's temporary, but Stef looks better than Vanyel now. Well, temporary improvement isn't nothing. She'll need to ask Blai what the maximum number of them is that he can get tomorrow morning. It's not worth waking him for that question alone, though.
She thinks Van is a little bit better off than he would be otherwise thanks to his weak Healing-Gift, and Leareth's Healers are benefiting more than that, but...not enough.
Seldan, she thinks, might last until morning even with no other intervention. His baseline life-force isn't as bright as Blai's, but he has a lot of - stamina, the thing Blai was calling 'Endurance' - and he can take a lot of Healing-energy, so he's not losing ground as fast. Blai ought to be able to make it until dawn too at his current rate of deterioration, his life-force got a big boost from the channel, but - barely, it would be cutting it close, so she's not sure of that. He might start fading faster once his remaining life-force is weak enough. Under normal circumstances Seldan could bolster him, Companions are very useful that way, but less so when neither of them is in good shape.
Stef and Van can more or less freely draw on each other's life-force. Which, again, is of limited use when both of them are dying, but any spell Blai uses on Van will help Stef a little as well, that's a consideration to keep in mind.
If she hasn't lost count, Blai has five remaining spells that could be converted to single-target healing. Some are stronger and some are weaker? Shavri doesn't have a very good sense of that part. She does have a guess that for most of the people in the room it doesn't even matter; even the weaker spell brings them up to their maximum life-force-brightness. It's possible a strong Healer could get a bit more oomph out of it, maybe they can interact with it like Healing-energy and throw a bunch of it at other people, but - that's a big guess, and it would probably help if the Healer in question wasn't operating on vastly reduced stamina, something that the Cure spells don't touch.
The question, then, is who gets what. Eight patients, counting Seldan and Blai. Five spells. That's assuming they don't turn up anyone else who is absolutely critical to the...to the next few days, whatever happens...and needs Golarion healing to be functional.
In the end, it doesn't seem like any of her clever ideas about pairs of people with entangled life-forces, or Gifted Healers catching and redirecting some of the energy, are going to matter enough to stretch five spells over more people than that.
Given that, it's pretty obvious what needs to be done. Blai should get the strongest spell – even if he's not the worst off, he's also the only one who can properly benefit from it. Seldan can probably benefit from the second-strongest. Then Van and Stef, critical to Valdemar, and Nayoki, also a critical point of contact with the rest of Leareth's people. That's it, that's all they can cover. Obviously they'll do their very, very best to keep the other three, Leareth's Healers, alive until dawn, but - Shavri isn't hopeful.
(Again, in a way it simplifies her problems if they don't make it. They're probably going to be tightly limited on Lesser Restorations.)
She doesn't even bother to try to find out if anyone important from Iftel was rescued with serious injuries. Let Vkandis handle it, this is all His fault anyway, Shavri cannot take responsibility for anything else beyond the people in this room and not even all of them.
Blai is still leaking life-force. Shavri might as well wake him in the early evening, after he's had a solid block of sleep but before he's desperately low, and confirm her theory that he's the only one who will get the full benefit of the strongest healing spell.