Sniper is hero who can easily last hit, harass, and deny, because of his large range and Headshot ability. With no point in shrapnels, all your mana in available for Snipe and it can get you easy kills if opponent is not careful or atleast force enemy back. Shadow Blade is very important in majority of games, but think twice about getting it when BH is against you or you already have invis hero in your team. Buy Desolator if you have good start and you are not harassed much, it you are you can buy HotD.