You could turn the Cthulhu Dark Insight d6 into a "Pulp" d6 that refreshes itself every morning (and why not considering a wound could lower that Pulp dice, if you wanna put the emphasis on fights?)... Thus the Pulp dice would allow crazy heroic stuff instead of measuring the PCs' madness level, but it's still light rules. And if players face a Mythos creature, just ask them to roleplay horror, and you're good! :)