What is the points cost of a chaos space marine havoc squad?

Answer 1

In my personal opinion, they serve as a 'specialist' squad so to speak. Much like the Chosen, you can slap a few meltas/plasmas/flamers in their, and if you put them in a Rhino, you can drive around and pick at your enemy. This is probably the most popular route.

Alternatively, you can do a 'meat shield' tactic. If you have ever used Oblits, i'm sure you've had a problem with them being targeted. With Havocs, you can have your 4 heavy weapons [I personally use 3 missles for hordes/light vehicles and a lascannon just to have that extra lascannon XD] and then have say..6 more Bolter marines, and have them all in your Rhino. That means you can distribute those 6 wounds to your regular bolter marines. This is personally what I do, and I've had moderate success.