Amazons are not difficult to beat if you stick with long range towers. I rarely needed to use fear on them and my towers, especially when I had a ballista tower on high ground.
When I loaded the game to continue where I left off, the range for the weapons went away. When shooting the rocket launcher, it's like I'm farting while holding a scented candle at my enemies. Seriously though, it would be nice to see this bug fixed. No range on the weapons whenever I load up the game except for the first time I ever played it.