Doesn't work as good when you get to the second island where the Heavies are more prominent. If stealth fails, either explosives or an LMG will be needed to take the bastards out. I found that the flamethrower excels at taking them down but I am struggling a bit against the Heavy Flamers. My current tactic when spotted is to run into some thick foilage and use a molotov cocktail when they follow me. You can lay some C4 next to a landmark before you start on taking an outpost, if it goes haywire you can detonate it when they follow. Go back and pick it up if successful (also makes a nice diversion should you need one, i.e. infiltrating the outpost from the other side to go in and smash the alarms) Edit: I ran into an outpost once that was guarded by no less than 5 heavies. Took down two of them but was too hasty and got spotted, and of course I hadn't made my way to shut off the alarms yet. The alarm pulled in not two but three full cars of baddies, in addition to the 3 Heavies pounding away with machine guns. Eventually I won but about $900 in ammunition was needed.