By Bismarck.Helel 2013-05-16 18:53:10
I would definitely bring a SCH for mastop. Helix + dia will force him to use emetic discharge for almost the entire fight. He's very non-threatening if this is the case. Also, make sure to bring multiple damage types apparently. Consensus is that when one damage type goes down, the other goes up. I'm not entirely convinced this is the case, or at least, I don't know whether it's related to slashing/piercing/blunt, or ranged/melee/magic. He's pretty easy overall, just make sure to give DDs hunter's/madrigal/prelude.
Scorp just keep dia on him and zerg.
You don't need PLD for either NM.
Edit: You may want to try having RNGs go /NIN to the scorp. I believe that might block his earthbreaker move, which can be very annoying (the stun effect).