A few things that could really help you:
1) You're way over the 2.5001 bp. With a 1.64 wand, you only need +53% IAS - you have 58%. IMO, get IAS on your Ammy to hit the 2.7272 bp, or, and I think this is best, get more IAS on your rings and drop the Lacunis for some crafted bracers.
Crafted bracers will most assuredly provide you with significantly more DPS and MIT, and a few hundred crafts should yield a really nice upgrade. You're missing 5 total IAS on your rings (one's a 7, other is a 6) - just add 4 IAS somewhere between those 2 rings and that will keep you at the 2.5001 bp.
More dps + more MIT = WIN
2) Your CC is way too low to maximize the efficiency of CM via SNS. Ideally you'd be in the 55-60% range, and you're only at 49%. Granted, you have +3% from your scoundrel when soloing, but in group play, 49% is way too low. Plus, adding CC should give you a nice dps boost.
Now while the EHP from IC boots is great, it's hard to beat the +7% CC and high MT of the Nat's 2-pc bonus. IMO, sell your IC's and Unity ring (you won't need that 221 LoH if you get more mit) and pick up a nice Nat's set for whatever fits within your budget. You should notice a HUGE improvement with your freeze capability and experience smoother runs with the added CC. If you could get a Nat's ring with AR, that would be ideal, which leads me to my 3rd point.
3) Lastly, your AR is really low. Like really low. I understanding why you're running EA/PrisArm for the added armor/AR, but doing so is a huge DPS loss. Running SA/SA will improve your eDPS by at least 30%. To do so, I would suggest trying to pickup a Nat's Reflection with AR (if you can afford it), buy tri-int-gloves with AR, and, although you're gonna hate me for saying this, swap out your crafted shoulders for some Vile Wards. I know you get a ton of HP/DPS from your crafted ones, but the extra Armor/AR from Vile's will add some good numbers to your MIT.
At 200k dps, you should be able to easily and efficiently farm mp8/9 if your MIT is good enough. I imagine with your low AR, low CC, and the fact that you're running EA, you struggle even at mp6/7.
4) Swap your FN rune to DF. Yes, reduced CD is nice, but if you're farming, you'll have a constant +15% CC up from DF that will yield better freeze, higher DPS, and faster farming efficiency)
If you're willing to make some changes to your gear (and hey, you could always equip those shoulders later on if you get more AR from other pieces), I'm certain you'll notice some big improvements with your gameplay experience. Plus, being able to farm higher mp's yields better results, so why not make a few changes so you can do so.
Definitely some room for improvement, but overall, great start. 6.5/10
And for whoever wants to review my newer SNS wiz, here's a link: