PfBlockerNG torrents and blocking countries

[Rango]

Guys. Help me understand from veterans perspective. I do torrents and as well know some of those p2p connections will come from different countries.

I would like to block hacker countries like russian, china etc but i don't want to block download from those countries while using torrents. I'm assuming firewall/IDS can do that or pfblocker can?

Same thing for android apk hosting sites. How can that be done in pfblockerNG? I will eventually have openvpn client as well. Currently i am using google chrome pfblocker and it works well.

Other reservation i have i think this dns service pfblockerng slows down dns requests on unbound dns service correct based on what i see in threads here?

If so anyway of keeping and not increasing dns requests times. Thanks in advance.