i dont like MLD just because i think it takes the fun out of the game and delays it if you have ever played a 3 hour game its most likely MLD had a hand in it other than that if you use single target land destruction i dont mind because when i get 20 mana out of my coffers in mono black that is kind of a problem for you
Edit: as for boros i would say run it only because i havent seen any really good boros decks
dont know if it fits your playstly or deck but i run kiki jikki in my 5 color with eternal wit pretty much lets you fetch any spell out of the graveyard lets say Time Stretch for infinite turns
I have had this deck for a while but just recenly started playing it more and was wondering if anyone had any tips or tricks that i may have over looked while i was focused on other decks i was hoping to get an opinion on how the deck looks so far
Mutilate
Sever the bloodline
Black Suns Zenith
Ratchet Bomb
Infest
AEther Snap
Massacre Wurm
sorry i can think of any blue ones off the topo of my head that you dont already have
Edit: as for boros i would say run it only because i havent seen any really good boros decks
http://www.mtgdeckbuilder.net/Decks/ViewDeck/885015
i already have an idea on what i want to remove but any insight is appreciated