Looks pretty good. The Wyverns are definitely a solid choice.
I normally run Pask in a Punisher as you get a better return on the better BS due to the higher number of shots, and his special skill with a Punisher is great.
Not sure about putting MM on a LR. You need to close for them to be useful and that's a bit dangerous especially as the Vanquisher and LC are long range weapons. They are also a lot of points.
I've never used Yarrick personnaly, but I've heard he's good if you use him aggressively. Are you putting him in a 50 man blob squad with two priests and going for it? Otherwise i'm not so sure on the priests or Yarrick.
Vendetta is still a good choice as well.