Set finish the main story line and I have a power level of 343. I bought the game and went through the story right next to my friend and he can do strikes and join a nightfall. The only way I can do with strike is if I am in his fire team and he starts one with the exception of a nightfall strike. The option just is not in my directory and I can't start 1 and run a solo mission. Has anybody else had this problem or know a fix?