With my avg gear(200k unbuffed archon and 150k sns/ww).
The best mp to farm on as SNS was 7 with 39.9 crafting items/hour, (mp6=37.8,mp5=37.7, mp8=34.6)
The best to farm as archon is mp5 with ARCANE DESTRUCTION, you wormhole into the elite then activate archon for 1600% dmg(mp5=40.2/hour, mp4=39.4/hour, mp3=38/hour)
A side note on arcane destruction, use force armour or you will literally instagib yourself on a reflect mob, at 250k buffed dps, it hits for over 4mil(aoe) on just activating archon alone.
I compared this to moldrans:
Its roughly equivalent to his insanely geared barb running vault of the assassins and is faster than ww/alkhaizer.
If youre bored, go to mp0, stick on arcane destruction, find an elite with reflect and 1 shot it and watch yourself instantly die like the old inferno days =D