SkyPiercer

Hi, I am unable to find Rilithar, when I was doing the sahuagin fortress quest, I had to travel somewhere to offload loot after exploring the first floor of the fortress, and Mistmoor was closer to that area than Saltmarsh, so , when I entered the Inn for a rest, his quest triggered at a very inopportune time, I had no free spots in my party and I was in the middle of an other quest so I declined his request for help (I think I chose the second option in dialog) and he told me that I'll find him in his house if I ever change my mind, but he's nowhere to be seen there when I came back to Mistmoor after finishing the Sahuagin/Lizards quest, reporting back to the Captain, and doing the Umberlee temple quest

I spoke to his butler, but doesn't mention anything about the whereabouts of his master, talked to Trissa upstairs and she says that she didn't saw him there in the past hour there and that I'll find him either downstairs or at the inn, but he isn't there. Talked to Narcissa and she told me to help Rilithar and I said "I'll think about it", I also talked to his companions in the 2 nd floor of the inn, the mage and the paladin, the conversation was concluded with "Good luck in your travels", but when I came back , they're no longer there, while the dialog of the innkeeper still suggests they were upstairs.

Really stuck here, I would appreciate any help on this matter.

Also, is it possible to prevent Chaarna from being snatched out of the party by the ghost of the Silver Princess ? I have been without a mage for pretty much the entire game up to this point, I have 3 thieves (MC, Candella, Shadow) and two Clerics (Rurik and that priest of Shar) but not a single mage, a lot of cool mage-only equipment and spells, but no one who can use them.