A 1v1 battle is pretty much meaningless in this game, as guild wars is meant to be played as a team. Also, since you can only run 8 skills, and the opponent could range from a ranger to warrior to monk, there's no way to fully prepare for them all.
Against melee, some good skills are riposte, deadly riposte.
Against casters, an anti-caster mesmer with backfire and guilt can work.
Against ranged fighters, blinding skills and projectile dodging helps.
It really depends on the match-up, and if you know the type of fighter the other player is using, the match is really pointless as you can easily build to counter them. If you don't, it's pointless because it's a random guessing game since you can't prepare for everything.
And Coloneh, that build will get owned by a simple touch ranger. GG