Get anything that boosts your crit dmg asap. zerkers can roll with the highest (end game at 100%) crit in the game, so you'll want to take advantage of that. after that decide whether you want sustained dps or burst dps. if sustained do what sic said, if burst max your cooldowns. i'd do what sic said after getting my crit stuff maxed tho, cuz i prefer sustained dps. you'll want your foci to affect your current abilities and you'll want frenzy maxed along with decap.