Heh, back in Wrath when I was trying to get Loremaster, I was still ~dozen quests shy in Kalimdor, and just couldn't find any extra quests, so I figured, you know, I'll do the T0-> T0.5 upgrade chain, that will get me the last few I needed, right?
So I started to farm the full T0 set, running dungeons over and over, until I finally had them all, then began the actual upgrade process. Most of it went fairly smoothly until the stage where you need the middle tier fire summon from Twilight Cultists in Silithus...
...it took summoning twelve of the middle tier guys before the FIRE one spawned, which meant you had to summon 4 of the lesser tier guys per middle tier guy. Which meant a shitload of Mantle/Cowl/Robes from the cultists.
Let's just say, I was exalted with Cenarion Circle from the sheer amount of grinding cultists before I got the proper flame guy to spawn.