Phantom Lancer - Illusions run out of control with enough attack speed and effects
Lifestealer - % based damage and lifesteal scaling
Alchemist - Incredible attack speed with his ultimate can proc effects excessively
Sniper - With enough attack speed can almost perma-bash an opponent from long range
Morphling - Ability to switch stats gives him incredible potential
Troll Warlord - Ungodly attack speed for the whole team with his ultimate
Anti-Mage - Usually outcarries through superior farming speed, still has excellent skills