What do you hope to accomplish by adding said relics?

Solely a unique time-sink? Then just take the greatest flexibility among components of ARR and HW's relic grinding alongside hefty bonuses to reduce queue times or give satisfying player counts on relic activities.

Actual customization? Well, then you've just triggered the fabled disillusioners of not-choice and the backlash may well kill off all future jobs before they could even be born. Current compositions should hide their not-quite-meta children.