And do I lose the progress if I end up lb them?

My weapons grid is: 4 Armageddon Lance (1 of them as main) the Dark Amon wep, Beelz wep, 2 random SR non dark and 2 random R non dark as well. (The gems gacha simply doesn't want to give me the dark R Kamihimes)
So probably gonna keep it like that.

What I need now is Soul points. I haven't realized we get a poor amount of them per level up.