Is your team capable of doing any heroic content? The rep grind on non-heroic may be unbearable unless you are prepared for a really long haul! If you do a heroic Gundrak and go to the south entrance, you can get a lot of easy pulls for 15 rep per kill. Like 2 trolls at a time, then if you turn into the shrine of Eck, you can do a bunch of 1-pulls on the guys in there. Also, Moorabi is pretty simple even on heroic. Give it a shot. If you have to do a non-heroic, you're looking at some bosses which are as tough as some of the easiest heroics. Try Halls of Lightning for a lot of easy pulls in the first room.