for mageweave cloth, one of my favorite places was the southern timbermaw camp near the new Fp they installed a few patches ago. (felwood)
Plus's...timbermaw rep for grinding. its a worthless old world faction, but while your killin mobs, why not grab a few free rep points while you are there.
detractions...lots of people will be mowing down those camps if they are grinding rep.
--if you need runecloth, move to the Northern Timermaw camp in Felwood...or farm BRD, easy to solo with most any class, and if you can DE while your in there, you can grab some LBS from the bosses.
Other good mageweave spots...lost rigger cove in Tarnaris. lots of mageweave, but you will get silk as well (trash, greens, ...ect)
lots of chest spawn points.
lots of groups wherre you can AOE 6-10 at a time.
decent respawn rate.
pirate foot lockers. these have the Lower. Middle and Upper map frags. fit them together get a quest to retreave a chest with 50-80silver, 2 greens and trash....best part of this quest-REPEATABLE. you can have as many completed treasure maps with you when you go for the quest that you can fill every slot with stuff and walk away with 20 odd gold in DE'ables, trash and silver....not a ton with dailies, but a nice added bonus...especially since the quest treasure chest is beyond far away in the WAY way WAY far south of Tarnaris.
----second item in the footlockers, Captins key...gaurenteed green and the cehst is inside the ship in lostrigger cove.