That a good question. I'm assuming your looking for more of a dps warrior instead of a warrior tank.
If you're going for a dps, then I would focus stats on Strength and Agility. The third stat is a bit of a choice. Cunning for crits and threat management. Willpower for spellsword. Prescence for Leadership.
If you're going non spell sword, then I would get the Eastern Greatblade from the arena. It's strong, good armor pen, and can inflict bleed which is an underrated debuff.
Dps warriors should eschew heavy armor for the attack power gain. Panoply of the Holy City seems like it's the best bang for your buck in non heavy armors.
Patrician Mask for leadership or Everblossom hood for your head.
Definitely go for gloves of giant strength for armor pen.
Senninbari for survivability, else just go for belt with a pouch for initiative (can never have too much initiative).
As for powers, maybe double attack for at-will. Definitely Whirlwind for one of your recharges. For your ultimate, I'm partial to Unbreakable for survivability, but many go for assassinate instead.
The main thing for dps is that you absolutely do not want to spike your threat which is hard for dps because high damage will do that. On thing you could do is to have flames within as your encounter. It does cost a turn of your action economy and does damage you every turn (the damage can be mitigated by fire resistance), but it gives you powerful buffs, and since you didn't act first turn, your threat isn't immediately spiked.