Hmmm... been thinking about the servants/grogs. Considering that Renatus will probably arrive at Fengheld by flying there, does it make sense for him to have a mundane grog at all? If you want to forego that, one can be assigned to you when you arrive at your new covenant.
Indeed, flying is the most logical choice so this doesn't really makes sense to bring a grog. If the party agrees, maybe we can still create him together even if he's already from the covenant.