Relic +1 or ?????

[EasymodeX]

Unless the primary stat bonus from the other gear exceeds the flat DPS gain from the weapon, such as Wyrm Mail piece for DRGs.
Gae Bolg +1: +2 flat damage +4 STR +3 Crit +4 VIT (over base relic stats)
Wyrm's Mail: +9 STR +6 DET +11 VIT +24 Crit -19 Skill speed (over Darklight Cuirass)

2 WD's worth about 15 str. Gae Bolg +1 > Wyrm's Mail in that comparison.

Unless you really want the HP from the Vit really badly, or the 19 skill speed on the DL chest is putting you over 200 skill speed and you want to remove it.

Or some other weird situation.