I looked at old enchants and it seems they all have a requirement of max 600 ilvl, so we can use them on current gear. In that case maybe we should get:
legs - Scorched Leg Armor - 28 attack power and 23 crit
cloak - Greater Critical Strike - 13 crit or Greater Agility - 12 Agility
bracers - Greater Assault - 14 attack power
chest - Exceptional stats - 6 all stats
gloves - Superior Agility - 15 agility or Precise Strikes - 15 crit
The difference isnt big though, not even sure if its worth unless we really want to max out stats (same with using cata flask/pot/food)