Troll raids really do seem like one of the most common. I'm currently playing a multiplayer server, Pretty much prepped for bonemass, but another has already beaten him (but has been putting off moder until others catch up on the server). I'm patiently waiting for some drake raids as a result so I have some glands ready to go for hitting the snow and despite enduring at least 30 raids so far, only 2 have been drake, the rest of the time I only ever seem to get troll or skeleton surprise. I've gotten 1 surtling raid, and I think I got the foul smell raid only twice. It's just constant trolls and skeletons instead. Still haven't gotten "you are being hunted" either but I don't think I'll complain about that one, they'd probably turn me into a chew toy lol.