Make sure head is a different omni that isn't prime so that you don't get armor reduction. Weapon set-up 1 - SRM Alpha 2 - Cycle MLas 3 - Cycle SRM This build should be very good for taking out all XL engine mechs and causing havoc among your enemy.
http://www.mechspecs.com/forum/index.php?topic=7142.0 I proposed the same build in a follow-up to an original build and I gotta say this weapons combo is devastating. Both versions are valid though I do prefer mine, matter of preference. Awesome build nonetheless. 5 stars!