Editing Warhammer 40,000/8th Edition Tactics/Chaos Knights (section)

===War Dogs===
The mini-Knights can still be taken in groups of three, but only the Renegades can mix and match the two different War Dog types in the same unit (for example, two Helverins plus a Warglaive). Keep in mind they don't have the Super-Heavy Walker rule the other Knights have, so unlike its big brothers, if a War Dog falls back, it can't shoot anything - something to keep in mind if going the autocannon route. On the issue of the meltagun or the stubber: if the War Dog takes the thermal spear and reaper chain cleaver the meltagun will serve you far better. It's Assault, firstly, you'll be in or near melee range most of the time with it, and D3+1 Melta shots sounds a lot more reliable than just D3. If you are going for the Autocannons, stick with the Heavy Stubber. The melta is more expensive and you'll almost never be within range to use it, unlike the Stubber, which is dirt cheap and has a respectable 36" range.
*Note that since you only have 1 datasheet, you're limited to 3 units total of these, unlike loyalists, who can take 3 of each loadout (and for everybody, each unit can have up to 3 members).