if u wanna get loads of sp, fight sth exactly 6 levels below ur char... decent exp (99-400?) good sp 1000+
if u wan a good balance of sp n exp, fight mobs exactly the same level as u
if u wan high exp low sp, fight orange mobs... their level is higher, but it isn that hard to kill... reds... are much harder, depending on the level... they can be 5 levels higher than u.. or 50 levels

the above is what i noticed in game lar...
if not right lemme noe again i edit my post