If your style is to get in close and knife fight, Short Range Blaster is a good option. Multicannons normally fall off at 2000m, so they don't get penalized as much as Lasers( fall off at 600m) with SRB.
Only one needs Corrosive. You could go with Oversized on the other to raise damage a little, or Incendiary to help vs shields.
A Long Range approach is also viable. If at extreme ranges like 6000m, targets become hard for sensors to resolve, and you could put Emissive munitions on one gun to help there - or mod the Sensors for longer range. Sometimes you might want to just poke a target to grab a bounty from afar. Vultures are fast and nimble, so you wouldn't be doing long range fighting unless you wanted- they can dictate the range most of the time.
If you are going to Bounty Hunt with police in the area, Smart Rounds might be something to consider. Not shooting the police is a bigger bonus than getting better gun performance, if they are helping you.