Bro,
I have been shooting mechanicals for ten years and back in the day they did say that they needed more KE that a fixed blade. The number they used to give was 55-60 ft lbs of ke, most of todays set-ups are way more than enough, like I said I have shot mechanicals my entire bowhunting career and have had at least 60 ft lbs and have never had any problems, 95% of my shots have been pass throughs and the ones that didn't were on big hogs bit they still got the job done and the heads I use are chisel points with a 2 1/2" cut....As for arrows I have always shot carbons and like to put the 3gr per inchweight tubes in but the last two years I haven't had any tubes and they still work fine.