I'm sorry to hear about Killian.
One thing you might want to try for the mucousy drip--when we were still trying to figure out what Priscilla had, the vet tried antibiotics. I think sometimes a secondary infection sets in and causes some of the dripping. Although it won't cure the problem, if Killian tolerates the antibiotics well, a low dose might clear things up a bit. An anti-inflammatory might also be worth a try. Again, not a cure, but something to keep Killian more comfortable.
Priscilla seemed to be pretty pain-free right up till the end.
that the same applies to Killian.
Please keep us posted, mrsjackblack.