You will do a ton of damage very quickly if your aim is good! You are more vulnerable than in other builds for a long time, so solo play will result in more deaths. Find a buddy!
Get Headhunter as early as possible, then buy Fleetfoot and Slowing bullets. Once you have these three you can easily swap between lanes and help gank. Creep when you can and steal enemy creep camps when you have tier 3 bombs.