to ChaosLordSam,

there is a specific daemon weapon depending on which mark of chaos you take
the daemon weapon for khorne is the blood feeder, pretty awesome stuff giving a
2D6 bonus attack to the user with the risk of taking a wound
and to happygrunt
i think you have too many meltas and the two oblitz also have
TL meltas and multi melta which can surely take down any vehicle and you would probably want some more plague marines or khorne berzerkers instead of so many marines