Being a "completionist" IS the wrong choice. By the time you finish your strike killing every single pointless incredibly low leveled mob out there, you could've beaten at least two strikes if you rushed it. Doesn't matter if you rush or not, you're most likely going to go straight to another one afterwards and spend the same amount of time playing with either style. Why spend an hour to do 3 strikes instead of spending an hour to do 6 or 7 and earning more XP, marks and rewards? It honestly does not make sense to kill the low leveled not required shit. Its way more efficient to keep moving on to the required mobs in ANY way you look at it.