I made this build because I was tired of my X-5 feeling like a fat Jenner. Don't get me wrong, the fat Jenner build is great, but I find that if I want to run 2 streaks and 4 medium lasers I grab my Jenner every time. So I decided to make something else entirely.
I saw someone use 3M build with 2lls and 2mls with ecm he killed 6 heavies when it was just him left, he ran out of time before he could kill the last enemy mech: an atlas