Ok, so just looking at wowhead the highest drop rate for these shards is the Zan'vess island southwest in Dread Waste. Would love to have a good profile made to farm these fella's with the 8/9% drop rate.
1) this is not the requests section 2) if you're going to request something ... give the developer as much info as possible ie: in Zan'vess at <this area> - and include a SS with exactly what area you want it to farm ... give them the mobs you want to kill, etc