If I was you I would go Chillrend its a 14 day but EP has good numbers their usually 3 bars all day.If you go skull you would be stuck getting ganked behind your gates everyday. So their no real fun in that.Also its a DC Buff sever I use it when am about to run a trial or vet dungeon for the boost.
Yeah I wouldn't go to SoC if I was you. Im DC and we wreck EP and AD on that server. I left it and went to Chillrend cuz it got boring to me. I use SoC for cracked cave or farming but that's it. Chillrend is a 3 way battle all the time more fun to me if you want real PVP.