Players have noticed that the Wrathion and Sabellion rep grind has been made much harder as the mobs needed for the grind are spawning significantly slower.
Wrathion / Sabellion Guide
Wrathion / Sabellion Grind Nerfed
Previously, the most common way to get this reputation was to do a 2×4 farm group in the basement. With 2 groups of 4, you would avoid too many tags and be killing stuff fast enough to cause a hyperspawn.