Elf Bane is another good one against foes without a purge. Makes the DoTs last a lot longer and makes Burning Talons insanely good. Elf Bane also boosts the duration of Magma Armor (But not Corrosive Armor), sets like Grothdarr, and any flame status effects you place on the target.
For getting some more HP with a powerful burst option Clever Alchemist is a favorite of mine for my magDK. Same with Balorgh that can make Leap hit like a truck going at 100 MPH.
For MagDK try this combo :
3x jewelry Buffer of Swift
2x light Buffer of swift
3x medium Deadly strike + weapon
2x heavy (monster set or combination of Gaze of Sithis + heavy chest trainee)
Nice for dot buff and you can combine the armor pieces with jewelry as you want.
With no BSW I would use Silks of The Sun and Ancient Dragonguard. Anything else your not going to get alot of damage. Deadly isn't very good and is out performed by raw spell damage like BSW or Silks. Deadly also doesn't buff your whip, leap or any of the direct damage from your skills.
Cleaver alch is also a very good option.
swift and deadly is good. trickery and deadly is also good. sustain and survivability are up for mdk this patch though so I'm rolling vd and bsw. vd and DC if I'm feeling trolly.
Right now I do back bar back bar wretched vitality, front spinners dual charged maces, a monster set (usually bloodspawn or balo,) 1 piece trainee, malacath and all infused spell damage jewelry.