Okay When a patch is introduced you not only have new tomb gear, but the FCoB gear. This is an ever shifting balance of power that follows the following path:

Relic > Tombstone gear > Enhanced Tombstone > Coil Gear > Relic.

or more complete

Philosophy (Darklight) > Relic > Mythology > Zenith > Allagan > Atma > Weathered Soldery > Animus > Unweatehred Soldery/ST > Novus > High Allagan > Nexus > Poetics (Garland Ironworks) > Reinforced Poetics (Garland Ironworks) > (adjective) Allagan > Unknown Relic step.

It's a vicious cycle