User blog comment:BannedLagiacrus/Monster Appreciation Week: Rajang(4th Gen)/@comment-26421638-20151010092912/@comment-5569775-20151012002836

You don't really need an elite team with a bunch of traps. Just trapping it twice with a team that has a Hammer user and ways to paralyze, while the Hammer user focuses the head, work perfectly fine. In between traps and paralysis, tripping him a few times or mounting him will keep him down enough to easily get the horns.

Also farming Fur Fixation instead of GQ's works better, assuming you either have the quest or can find a room with the quest. Ending via Sub, if it looks like you'll fail before killing it, but after breaking the horns. You can get both Hardhorns and Gorer's this way.