If you play dota on dektop or laptop does not make a differance. The only way the person could get high weapon in short time is this ..

1. Last minute hit on creeps.
2. Bought weapon immediately after reach cash target.
3. Farm creeps in the forest.
4. Take the killing oppurtunity to weak heros or the Kill Steal (KS is bad but if that wat it takes to win then what ho.)