WP -- Fresh 50 OK
CM -- Fresh 50 OK
HM Ifrit -- Fresh 50 OK (but having some DL / WP gear would be nice)
AK -- WP & DL gear needed (a combination of 4 pieces should be fine) iLVL 50+ weapon required by all DPS
HM Garuda -- NO AF GEAR ALLOWED
HM Titan -- Complete DL set + Ifrit weapon at least

These are considered acceptable baseline loadouts to prevent yourself from being a burden on the group. I'm not saying that these loadouts are absolutely necessary to complete the dungeon, but they should be considered as guidelines for those wondering if they are geared enough for each instance.