If you have void 2nd and heavy, you are good to go. Try not getting the heavy ammo right away and pick it up later to avoid getting rocketed before actually manage to use it. Personally, this is the bounty that let me "git gud", Personally, also as a hunter, I have never manage to properly used the Fusion rifle before but after the bounty, it was my personal go-to crucible 2ndary. If you really want the gun but still can't manage to perform well at crucible, I recommend waiting for IB to come out and play when all all the 30s are gone. I'm not saying that doing it is bad but its the least time consuming way and could take only 5 games for 500 points so its up to you.