I missed out on the final piece of the 305 puzzle on my warlock for the fifth week in a row a while back so deleted the character and started again. If you store your gear it's only a quick run through the story (to level 20/21) and you can grab exotics from the vaults collections at level 14/16 so you're using a weapon you enjoy for the end. I did it for another go at the engrams that week but they dropped lower than needed anyway XD