well exploiting the game is not the best idea especially posting about the idea of it on here. but none the less the best option for you would be running nightfalls as well i think they count for 2 or 3 strikes per run if i'm not mistaken also run the lower level strike play list as you can do speed runs on them and will be quicker to do. although the chance of getting better rewards from the higher strikes on the playlist are worthy of the effort. exotic bounties are not meant to be easy... if you are on ps4 add me and i will help you run through some strikes and nightfalls etc