So what i am prob misunderstanding is that the comm's you get. You purchase a unassembled Rakata or campaign piece of gear from a vendor then take it to fleet and trade it to the rakata or campaign vendor? Or is it a loot drop that you take to the rakata/campaign vendor and trade to them?
You can't buy Rakata or Campaign items with commendations, they are from loot drops for unassembled items only. You can buy Black Hole gear directly with commendations which are the same rating as Campaign, but without the set bonus.