No need to be harsh here. Throwing really seems useless at the beginning. Discovering it's magic, is something comes when you're more experienced with them.
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And lemmy, are you still a one handed cav? I think the issue here is, there are not much good throwers to piss you off. Because, [throwing=lesser accuracy+bigger damage]. In which the accuracy part is not that important for horses, just because they are bigger. Which makes throwing, a counter to cavalry. Yes. I believe the reason you did not get pissed off by throwing is, the lack of good throwers in quantity.