If you're playing a US server from EU, the best thing to do is to look at this website: http://www.submarinecablemap.com/
Look at where network cables land in the US, and rent a server there. If you click on a cable you can see who owns it and who has the power to lease it... The general idea is that you want to make the "biggest part of your journey in the fewest and most efficient jumps". By taking the option of a VPS near where the cables land, you should be able to force your traffic to go through that cable (as opposed to taking some cheaper route which usually goes a much longer distance.