Nice try. Though a general advise is do not mix weapons. You don't have split fire so different special/heavy weapon in the same squad will be a turn to turn waste..... The only exception is plasma gun, combi plasma and Grav cannon in a 10men
Tac squad.
The command squad may be scary, but it is better to take all melta, and put the grav guns on your bikers. The salvo type weapons is best used on the relentless platforms.
If you are using a
CM, I think there is two good configuration, one is "smashbane" that is bike, artificer armor, shield eternal and
TH, second one maybe arming the Teeth of Terra,
PF and Artificer armor or Terminator armor, the
PF ToT combo potentially gives you 9 S6 AP3 I5 attacks on the charge that may slaughter a whole small to medium sized unit of
MEQ all on his own

. Terminator armor is recommanded if you are riding a droppod, which let you fire your Orbital bombardment on the turn he come in, while points wise it is no different from artificer armor since the
PF upgrade for Terminator armor model is only 15pts
iirc.
Automatically Appended Next Post: BTW, command squad is usually not a good close combat fighter. I propose using apothecary instead of champion and standard. And give a few Stormshield to them, let them look out sir if there is
AP 2 fire coming in, for AP3 or worse
AP, tank it with the
CM.