MZ sounds like a neat challenge now...
Point Lookout has my attention the most now.
Well, if you do MZ earlier than level 30, the enemies are not bad at all. I just finished it myself. I had entered the DLC as a level 12, left as a level 13 or 14 (I do use "Arwen's Reduced XP" mod), and there were a total of 2 or 3 NPCs in the aforementioned 110% damage resistance armors. The rest were normal and very easy to kill foes.
By the way, to hit level 30 at all, you do
need Broken Steel. Else you're stuck at level 20.
So, depending on how close you are to level 20, your priority might be the higher level cap that BS provides.