pretty easy to kill but they like to travel in groups of 2. usually 1 stonger one and a weaker one. at lvl 11 if you attack a a group of 2 walking together (1 blue con, 1 green con) they will drop a small chest with about 2-3 silver plus 2 bags of coins 75cp-1sp 25cp and 1 or 2 other items you can sell for 30cp-75cp. you also get good exp because you get a bonus for attacking grouped monsters. another hint... kill the blue mob before you kill the green. blue mobs hurt you more.