Few questions about PVPing.

So I've been interested in trying out GW pvp for quite sometime now but never really bothered to since I was too busy with the Proph,NF,and Eotn campaigns.

I'm thinking about playing a SF ele pvp char. I was just hoping if someone could give me some guidance as to what I should really be aiming for? As of right now I've been doing Random Arenas.

How do I get zaishen keys? And where do I use them at? Any help would be appreciated.

Tolkano can give you zaishen keys for 5 reward points or 5k balthazar faction. The zaishen chest is located on the isle of nameless. An explorable are you get to from Great Temple of Balthazar(GToB)

unless its in a team of 8 sf eles you arent going to be using sf much....you may want to focus more on mind blast and SH(for ha) or b-surge or WT(for gvg)