Modeling is great. I've done massive conversions for my Night Lords list, including raptors with their feet on the ground so they don't fall over if you squint at them (based of Khorne berserkers), furies that don't make you want to hurl (based of of daemonettes) and others.
However...you can do some stuff to seriously increase your armies tabletop potential.
I'd suggest using the following list (which I made, based off of yours).
Lieutenant, paired lighning claws, daemonic flight, frag grenades, infiltrate (111) Aspiring Champion /w power fist, bolt pistol; 2 CSMs /w plasma pistol, ccw; 5 CSMs /w bp, ccw; stealth adept, infiltrate (192) Aspiring Champion /w power fist, bolt pistol; 2 CSMs /w plasma pistol, ccw; 5 CSMs /w bp, ccw; stealth adept, infiltrate (192) Raptor Aspiring Champion /w power weapon, bolt pistol, d. strength; Raptor /w meltagun; 2 Raptors /w flamers; 2 Raptors /w bp + ccw; infiltrate, furious charge (260) 8 Havocs /w heavy bolter, autocannon, 2 missile launchers, tank hunter, infiltrate, stealth adept (243)
|