pistol/goby tank mates

[czwicky]

I currently have an 8g aqueon evolve nano reef that is approximatly 2 months old. My current stock are 3 nassarius, 2 very small turbos, an tiger pistol shrimp, and a tiger stripe prawn goby.
I was wondering what other inverts you guys think I could put in this tank? Keeping in mind it is a zoa/lps tank. I would like another shrimp or two but I'm not sure what would work with the pistol shrimp. I've heard about pistol shrimp pairs but could I have 2 pistol shrimp with my single goby? I think the happy little family thing would be awesome lol

 

[Breakthecycle2]

I've got two with mine, but one pistol goes about his own business away from the pair.