Thanks guys, ye I have the books but I was just confused regarding the "soup" lists as I had heard conflicting arguments. I personally prefer to not to mix armies but going by the few games i have had in 8th edition lots of people seem to be going for "soup". I fear i may have to do likewise to stay competitive, so I will probably be making some themed
SM and
IG lists. Thanks for pointing me towards chapter approved that clears things up. Now I can make sure there are no cheeky command points from 'imperium' battalions. Thanks again.