Use a GvG build - get if off wiki, learn to play it well,
learn to play it well. That way you make yourself a solid team member, and with 3 other solid team members you have a solid team.
Then you take your GvG build which you know how to play well, hit enter, just suck it up with losses till you get a decent team, and enjoy the pvp along the way.
Eventually let's say you get a hammer warrior, a ranger, a necro, and a monk, you might get 10 wins, but you don't even need a terribly balanced party to beat whatever random groups you meet. Remember that you may only win 1 out of 10 games, but everyone else there also has the same awful odds and only wins 1 of 10 games, based on this we can assert that if you have a bit of an idea what you're doing you're bound to get at least a few victories.
I've got 10 wins without a monk (beating 4-5 teams with monks along the way), 10 wins with a rit healer, beaten 2 monk teams without a monk, lost to a team while I had a monk then subsequently beaten them with all warriors, etc.
TLDR VERSION
1) Run a GvG bar. GvG bars will always be the best pvp builds by far.
2) Suck it up and play.
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This is what I use in RA, actually I made it myself after improving my self made hammer build for a month or so, so the fact that it's on wiki is only tangentially related to me. I'm quite good with it, and given the right circumstances will do a lot of damage to the opposing team. I run antidote signet for my optional, because although there are more interesting/ cool options it helps a huge amount against otherwise unbeatable bsurge else, blinding rits, etc.
http://pvx.wikia.com/wiki/Build:W/an...Hammer_Warrior
Don't get stuck in flail, noob.