basilisks in particular are underpowered. in another thread someone said maybe the difference between head, chest and legs should be there, but be less significant. like instead of head, torso and chest taking 4, 2, and 1 times damage, respectively, it would be 1.5, 1, and .5, or even less, at 1.25, 1, and .75. The problem is that a basilisk can't hit a humans head from the ground even if it looks up, and so it still takes like 8 swipes to kill a trapped person. That is ok if the human is totally by himself, but in a group of even 2 people a basilisk is mostly scr00d.
although, in the favor of the current system, I do love fast kills with the dretch in s1, and it makes sense that biting someone in the legs takes 8 times as long to kill them as, say, biting them in the face...