I dont think you even play the game. All normal mobs give the same exp regardless of lvl and its the same with yellow mobs. The areas you can "speed run" through are only a small part of the strikes that takes maybe 1-2min to clear(4-5min on that Mars strike). Strikes I completely clear in 10-15min are just as fast or faster then your speed runs. By speed running you miss a huge chunk of exp and potential loot.