As of now? Hmm...

On the Source, I think Vicious could settle in the Ruby Sea quite easily. Someone's got to keep those Aramitama's tame afterall, and then there's the village of Isari, the Confederacy, and the Kojin for company. Easy access to Yanxia to visit with Hien and easy access to Azim Steppe to visit the Mol and participate in the Naadam every time it comes up, so he doesn't lose his skills. A nice cerulean view from the top of Heaven on High as well. Feel like a wild night on the town, take a trip to Kugane. Easy peasy.

On the First, if that could remain an option after everything's over, then I could also see Vicious taking up the task of restoring Holminster Switch. It's a beautiful tract of land, and in spite of being extra crispy, there's some good building foundations there to take advantage of, and that'd be a super nice place to just settle and retire too, I feel.