Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is not meant to be a full explanation of Mord. I recommend the master of doom build that is highest ranked. This build has high survivability yet focuses on his dps potential. His two main dps abilities scale with different stats, however CD reduction bypasses this and makes Mord a dps powerhouse. The CD reduction caps out (achievable with these items and blue buff)at Mace of spades hitting once every 2.4 seconds and creeping death every 3.6 seconds. This means you are hitting hard and fast which recharges your shield which is kept up with your large amount of dodge armor and magic resist.
I cant promise the world as the player makes the build not the items but I have been able to turn games around by being a difficult to kill master of metal whose dps potential is continually underestimated.