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I bought two boxes (10) of Chaos Knights. I'm currently painting up a Khornate themed army.
- is it better to run them as a full unit of 10 or two units of 5?
- is full command (or any subset of that, like just musician etc) recommended, keeping 8th in mind?
8th edition or not, two units of 5 frenzied knights is far better than one unit of 10. In my opinion, the standard bearer and musician are worth their cost, but a champion is a points sink that more often than not costs you combat res.