Sorry, meant Catherine in the title

I play Catherine and I used to always rush Warhorn as my first item. Now that they've split its abilities up with Contraption, though, I'm not so sure what to do. Is Contraption better with her? The extra health and mobility on Warhorn is nice, but cooldown, energy recharge, and unlimited flares and scout traps is pretty awesome on Contraption. Is it a crazy idea to get both? Does anyone know if the DPS stacks if you get both of them? Or should you just pick one and then switch to other items?