I don't own any Marauders yet but here is my idea for a fast flanking/support mech. Its a bit lack-luster on weapons but should provide ample pain for the enemy team. I ran BAP on this to counter ECM Mechs trying to counter flank you, and AMS because I haven't yet mastered dodging LRM's in anything bigger that a Light. This may work at medium to close if you get into a brawl. If you have tried this load out post a reply saying how it ran. Thanks
Undergun, and WAAAAAAAAY too much DHS. You can put more firepower in this babe, it is a heavy. Right now this makes me think of this: The lightest medium can sort of do the job, so you really need more firepower. If you prefer this level of mobility and firepower, use a medium! You can have smaller profile, faster speed, JJ, ecm and what not.
I have the 3R and it is a difficult mech for my playstyle. BAP isnt worth it unless you really need the locks, and if you have Radar Derp modules that is a tonnage free addition to deal with the current LRM spam in the PUG queue. I was running a quad large pulse build which was nice, watch the ghost heat!