Level 6 Research Bases (You'll have to go ask them for a spot, maybe put in he's your bro )
In just a random order

Raiders of the Cove (I think it's maxed for res mods)
I D I (haven't actuslly been here but I've heard it's L6 res.
X Ascendant (went there for like 5 mins or so, but they give minerals last time I checked)

These are just the ones I can remember off the top of my head, if I remember more, I'll edit this.
Sorry if any of these legions switched and are not arti. Lol