Oh uh I just noticed you can further augment the +2's relic gears. I don't know why I didn't see this earlier? But I'll post here their further augments:

Wyrm Finger Gauntlets +2 Trial 4954: 20,000 XP in Dynamis - Jeuno or Dynamis - Qufim with item equipped. Adds "Enhances 'Angon' effect"

Wyrm Greaves +2 Trial 4954: 20,000 XP in Dynamis - Buburimu with item equipped. Adds "Enhances 'Empathy' effect"

Wyrm Armet +2 Trial 4954: 20,000 XP in Dynamis - Xarcabard or Dynamis - Tavnazia with item equipped. Adds "Enhances 'Deep Breathing' effect"

Wyrm Brais +2 Trial 4954: 20,000 XP in Dynamis - Bastok or Dynamis - Valkurm with item equipped. Adds "Enhances 'Strafe' effect"

Wyrm Mail +2 Trial 4954: 20,000 XP in Dynamis - Beaucedine or Dynamis - Tavnazia with item equipped. Adds "Enhances 'Spirit Surge' effect"

Too bad I don't know what they actually do yet : (