Traceroute looks good. Pinging it is also good (consistent ~60ms). Although something I forgot to point out is that I get the exact same spikes on their EU server. Same thing goes for another game that is experiencing these spikes on their NA and EU versions, Tera Online, but I don't have access at the moment to do any testing there as they do beta weekends every 2 weeks.
Tracing route to us.login.pathofexile.com [173.193.1.14]
over a maximum of 30 hops:
1 1 ms 4 ms <1 ms 192.168.1.1
2 * * * Request timed out.
3 28 ms 9 ms 24 ms 64.59.177.66
4 40 ms 36 ms 54 ms 66.163.78.38
5 28 ms 29 ms 30 ms te1-7.bbr01.eq01.chi01.networklayer.com [206.223.119.63]
6 51 ms 56 ms 55 ms ae20.bbr01.eq01.dal03.networklayer.com [173.192.18.136]
7 56 ms 62 ms 58 ms ae0.dar01.sr01.dal01.networklayer.com [173.192.18.253]
8 61 ms 55 ms 57 ms po2.fcr05.sr06.dal01.networklayer.com [66.228.118.223]
9 55 ms 53 ms 52 ms 173.193.1.14-static.reverse.softlayer.com [173.193.1.14]
Another note: It
was working fine in game for about 30 minutes randomly (with the router) and then randomly stops working fine.