The bit about the only rewards coming at the end is incorrect. I play like u do when im playing for marks but when i reach my limit i take my time purely because the enemies u kill drop engrams. the difference between you & me is that if im running thru the strike & my teammate is dropping back, i WILL turn around & help him out, from what i see thats 1 thing u dont like to do or at least u seem that way from your post. Ive found legendary engrams in strikes, lotsa blue engrams aswell from killing enemies. its rare that the only rewards i get are the ones at the end. Even tho blues are no good to me they are handy for the cryptarch levels.