[quote]it sucks to grind out ~50 vandals just to find one reaver. What do you guys think? [/quote] You got to know where to look. Two reaver vandals spawn in the rocket yard toward the back on the right if you're coming from the divide. There is a really good spot to get hive majors in the cosmodrome as well. The tunnels, in The Steppes area. For both of these. Walk far enough away, come back, and they'll spawn again.