Why are you speed running for class mats? Class mats can drop off any enemy so you're just missing out on tons by doing so. Marks sure( though I have no clue why people need marks anymore) but class mats are a reason not to. Also while I can farm the exclusion zone is rather farm class mats, bounties, glimmer, and faction rank at the same time making it the most efficient use of time. You seem to be wasting your time.