Out of all the weapons I listed the Incinerator is probably the weakest one. The key is to take the high ground so you lob down on them. The flamer chews them up asap with pyro perk at close range. But you still take a sting here or there. Best is the missile launcher, you can drop a whole swarm with one HE Missile.
Really, the whole key against them is antivenom. You need a surival of 40 to make antivenom or you can buy it at a doctor.
Edit: Or the bug killing perk. Pyro + Bug Killer(Endomoligist - Ack that is some bad spelling) = Great fun.
Thanks, that's probably it unfortunatly most cazador groups are placed in a small gunnel.
Only high ground is a small slope at best, apart from the Goodsprings cemetary / scorpion ally area.
Don't worry I know about the Anti V, never leave home without some.
Still have to try pyromaniac this game, FO3 it was a favourite on a big gun build, emnotologist is a killer I've found, also another favourite from FO3.
Edit2: But lets be serious here. The most effiecient solution is the guns one. Long range snipe weapon (peg them they first detect you - they fly straight up in the air for a second) or a 10MM SMG with Hollow point or Riot Shotgun. Or an assault carbine. Sometimes it gets really annoying that Guns are hands down the best weapon for almost every encounter. Ah well, what can you do....
Yes, these are two tricks I normally pull, the cazadore's AI is very predictable.
Though a cowboy build + hollow point loaded weapon and not sneaking is both fiun and challanging.