Van Saar are an expensive shooting gang, who generally rely heavily on Plasma Guns to be effective. You should be aiming to have about 8 fighters in your 1000cr starting list, though you may be able to get away with starting at 7 fighters. At the minimum, you'll have 1 Prime (Leader), 2 Augmeks (Champions) and 3-4 other fighters, including one Tek Specialist.
Unlike most other gangs, Van Saar don't have the option for mid- or low-priced special weapons (ie, the Grenade Launcher) or the heavier hitting basic weapons (Combat Shotgun or Boltgun).
Your typical loadouts for your Prime and Augmeks will be Plasma Gun and Mesh Armor. There are other options for special weapons (Grav Gun, Rad Gun or Melta Gun), but they're all generally less effective and cost more than the Plasma Gun. Anyone not carrying a Plasma Gun is probably carrying a Lasgun, because the other options are more expensive and generally not good enough to justify paying more and also not particularly upgradeable.
You could (for 995cr) do Plasma Guns on the Prime, Augmeks and Specialist and then take 4 Subteks w/ Lasguns for 8 total fighters, but that's the type list that ends friendships; I wouldn't advise it unless you know you're in a very competitive group.
Your best bet is probably to take only 1-2 Plasma Guns and maybe swap one of the other Plasma Guns for a Melta Gun, Rad Gun or Grav Gun. You can spend the any remaing credits on Mesh Armor or Hotshot packs for your Lasguns. Or you could switch out 1-2 of those Subteks for Teks or Neoteks.