Even if you split the arms, I know shooting at me when I'm not shut down would result in you shutting down or taking overheat damage.
And I'm perfectly happy to override shutdown in my Scorch, slap the twin Coolshots, and take the impetulant Nova down with one or two salvos. I know I can survive the overheat damage, and I know the Nova will at the very least end up crippled (And what's more, I'd rather die a fighting death to some BS build than overheating and getting ungracefully headshotted).
Either way, the silver bullet for this "Cheap hack" of a build is well-aimed and massed fire or a smart pilot. On lower tiers or against people who simply got to a high tier via luck/time playing, this'll net you one or two easy kills. Against someone who's competent, far less so.