What is the best pearl of ineffable knowledge to get?

I heard it works best with high magazine guns so I’ve been farming for mag size and fire rate but some of the Other combinations don’t sound too bad like Health And health regeneration. Just Wondering what the go to Is ?

The strength of the relic is sustained damage. I would lean towards mag size being a must have , the second would probably be reload speed, then a toss up between either fire rate or health regen.

Of course it depends on the com and shield you’re working with as well.