Reaver is a supermassive attack unit as we have known.The attack range and destroy ability is totally impressive.But it has some disadvantages you know Reaver is an expensive unit and also it needs high technology to produce it.Especially its speed is too low and its armor is very weak but although this disadvantages its unique properties makes it a very succesful war machine.If you use a probe with a shuttle which is named ‘reaver drop’ in multiplayer gaming of Starcraft,you will usually break the enemy economics or defenses without loss.But here the trick is fast loading and unloading the reaverto the shuttle.So it means high APM average gives high tactical advantage if you will use reaver drop tactic.