You combine the 3 parts at Valdrakken "Empowered Arcane Forge" - this is next to the crafting order bit. 36.46, 61.94
If you're consistently unable to loot the booster, check that you don't have Paracausal Fragment of Frostmourne equipped as the passive effect will mark you in combat for as long as enemies are dying in range, which will be constantly.
this is the most stupid loot ever .... even those mobs are lvl 40 and my toon is 70 i'm not able to loot this thing while in combat
There is a Satchel in High Mountain (found at least a day ago). Why not update the WoWHead guide to show as such? Or was it not shown/found by one of your peons and so it is not yet worth to be posted about?Two more have also been listed as found in the past few hours (near scholomance and the other in grizzly hills). Bringing the total to 14/15 satchels.