you can try OriginRo
we're a new server - low rate, 3/3/2
server is located on the u.s. but it has a good ping to EU
we are at episode 9.0 - rebirth, no taekwon gunslinger etc....
about population - we are a new server so we're still at growth (opened on the 1.1.17)
check our website for more infowww.originro.com
Good Luck !