I am currently adding in some sternguard as allies to my Space Wolves. The main reason was to access Grav, and go for a 10 man squad with maximum combi-grav and grav guns.
A friend has told me it is 'standard' to go half grav, half melta and then combat squad to match different threats.
I have sufficient anti-tank, it was grav I wanted.
Am I missing a trick, is half grav half melta more efficient?