Its time

So im finally going for my first 2k points

I currently have the 10th leviathan set + a hive tyrant

Im wanting to get a mawloc and trygon

. A few questions with that is it worth having one of each or should i just get 2 mawlocs or 2 trygons

. What else should i run with mawloc and or trygon to get full effect from them or are they just good on their own