Weapons

[Vomitus]

I personally never buy rocket swarms. I prefer Fire Arrows for its higher dps and for multishot ability. 370 dps is significantly greater than 300 dps of swarms and slight lack of range is perfectly compensated by dps. I use heli and mostly have speed advantage what also compensates shorter range. And I don't like plasma waves because they are not multishot and they suffer more significant effective damage loss when fighting in crowds.
Also using fire arrows I can surely kill running away enemy with low hp(50-100 hp) just flying into horde of his creeps inbetween which he is fleeing out. I have greater chances to hit him with fire arrows. Swarms has smaller chance(because their effective spread is lesser than those of FA and because of their greater range which means they will hit more creeps) and also lesser dps. Plasma waves have even more less spread and you can die before you even hit your enemy once.