Don't use V P N lol i got some crap one and my ip got changed 3 times (everytime US ip) and they banned the acc within 8hour of creation. Now i use my own EU ip and no problems at all.
Well i just started 2 battlechests up on US servers. and I live in denmark . So far so good.. Lvling 2 chars . lvl 40 and lvl 47 atm.
Only problemi got is the latency, If you got bad internet you should not have bots on US servers. I used my bots at my friends house, he got some slow internet and the latency on My Us bots was around 400-500 MS and my EU bots was on 100-200 MS
But at my own house, theres no problem.. Highest latency on US bots is 160 ms.. Good enough for bots.