I have been able to defeat insane Chaos with SM and IG on small maps like Fallen City. I also succeeded with a couple of other matchups on larger maps, such as SM vs. Eldar . However, I am utterly unable to defeat Insane Chaos with SM on Dread Peak.
Any tips from experienced players will be much appreciated. I have tried more than ten times with various tactics. I tried early game tac squad push, dreadnought rush, and pressure until tier 3 or even 4. However, even if in everygame I hold at least 3/4 of the map, I am always utterly outproduced and overwhelmed by their massive force.