Honestly... depends on your skill as a tank. Though it'll change in the upcoming patch, I'd say farm WP/AK regardless of you're gear. Skill can make up for your lack of gear(assuming that gear is your quest gear at least). If not then take the long way. Farm CM/Praetorium until you have tons of tomes for DL. Generally it's WP to AK. Since WP is suppose to be easier and provides i55 gear while AK provides i60 gear.