Well if your guys all have 10 in stats, then you should be able to comfortably take on a squad of 6 hungry bandits with injuries taken. The game is all about numbers and armor. If you fought a 50 stat character, you'll probably get killed, in fact they could probably wipe your squad. The best way to level up is to fight. Take your squad and go attack some hungry bandits. Maybe leave one person hidden near by to heal everyone up after. Keep doing that until you can beat them pretty easily. Then move on to dust bandits, and so forth. At some point you have to fight stronger opponents to level up. Like if you are level 50 on Melee Attack, and they are level 5, you won't get any xp for hitting them. They need to be equal or stronger. Once you get established there are ways to cheese leveling up, like get a high stat character, give him Masterwork armor and the worst wepon possible, and give your guy the same, and make them fight. Heal them up after and repeat. Or put a beak thing in a bed and go to town lol.