Surely a light-medium armor would be the best approach as melee is based on rushing the enemy? Combat MK II is probably the optimal approach.
No it really isn't.
Hmmm, I had a idea I might have to try.
Why not go with light armor - best I know of is reinforced leather. And get sub dermal implant & toughness x2.
Then get the travel light perk, oh and have 10 Agility.
You will run much faster - and get shot less, reducing the need to soak damage.
Also might want a 1-hander to compliment your 2-hander, you will move faster.
But then your not really soaking as much damage, if its small arms fire then it really doesn't matter its not a threat to you, a stimpack and your healing faster then your hurt. against bigger guns your going to want that extra protection. Then of course melee attacks tend to deal a lot more damage then firearms. And as your engaging those foes up close and personal you want that extra DT.
The speed difference simply isn't enough, if you want some extra speed wear the Telsa power armor which is classified as medium and has only slightly less DT protection then the regular Remnant power armor. And with jury rigging it can be repaired using any medium apparel. High DT protection and no speed penalty.