WishmasteR
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I would like to ask a couple of questions:
2. In my opinion, the skill is useful if the hero is a ballistics expert. The ballista makes it much easier to defeat neutral creatures on the first map, which is why many strong players start with Gurin.
3. Well, in offline mode, every single cell matters for each hero. In online mode, it's not as strict, but you still need to use the basic nuances (like not collecting resources diagonally).
4. But let someone else tell you about that, because I'm barely more than a newbie myself.