I'm trying to build a genestealer cult list of entirely imperial guard stuff. So 3 brood brothers squads of 10 are my only troops, I have 2 cult sentinels, 1 heavy weapons squad (1 lascannon, 1 heavy bolter, 1 missile launcher), and 1 cult leman russ. My hq's are a magus (for the tits) and a patriarch. It's a small list (not even 1000 points) but it's certainly a start and I'm intent on adding more once I start getting the models. How viable does that sound? Also, do you think people would be fine with me playing it as an imperial guards list just with different models?