Please check out the stickied topic
here, which explains about not including points costs for individual upgrades (both for legal reasons, and because it makes it easier to read).
I wouldn't bother with the flakk upgrade for squad 1 - with only a single shot it would take the entire game to bring down a Valk or Vendetta.
Depending on which unit is going in the Razor, swap the flamer and grav in squads 2 and 3 - squad 3 wants to be charging, so it can't fire a Salvo weapon, whilst squad 2 is bolters? You haven't shown any basic
ccw swaps?
If you need to shed points to get to 750, I'd suggest dropping one of the
HQs.