Do zenith last. All of the STR that you'll stack from your gear will make up for having an ilvl80 weapon for months to come. I took the rather unorthodox route of getting my Hero's accessories first because I have both PLD and WAR to think about. Do a quick audit of your gear, and look at where you'll get the most stats:seals. You will probably do body -> legs -> extremities -> accessories. Best of luck, and have fun farming!