Headshot Sniper is all about abusing your long attack range with Headshot's bonus damage and mini slows early-mid game to quickly shoot people down at a distance while they can't get away from you. Headshot is very stong early on with the bonus damage and mini slows combined with Sniper's increased attack range and fast attack speed. Attack speed, attack range, and damage are the key components. Harass enemies from a distance in the laning phase then grab a Maelstrom to farm quickly. Sit back in team fights and deal a ton of damage while slowing your target.

Max Headshot first to harass, put 1 point of Shrapnel at level 2 for the visibility, and max Take Aim second for the bonus damage, attack range, and armor.

While laning, stay back and get as many last hits as you can while constantly right clicking enemy heroes in between last hits. If you are back far enough you won't pull the creep aggro so you can hit melee heroes as they try to last hit. You want to get people alone in lane so harassing the other one out of lane is essential.

By level 6 you have 3 points in Headshot, 1 point in Shrapnel, 1 point in Take Aim, 1 point in Assassinate, and 260 bonus attack range from your Innate. You can melt any caster and some tanky heroes if you get them alone in lane, which you can easily do by harassing the other one out of lane by spam attacking them from a distance. Start shooting at a distance until they start to flee. Put up a Shrapnel on their path away from you as the cast range is quite far, activate Take Aim to get increased attack range and 100% Headshot chance and start shooting. If you need to, cast another Shrapnel behind them again while shooting them as they run (slowly). If needed finish them off with Assassinate although you often don't need to.

Works great as a core in safe, mid, or off lanes.