HP's ?
 

Is there any way to see how many HP's a monster has, or how many HP's he has left when you are attacking him. I know you are actually attacking a group of monsters represented by one creature ... and the green line under them represents their health ... but I was hoping there was a way to see a number instead of the Green line ?

Yes. Right click and hold on the monster to open his/her/its window. Health line show how much health it has left and how much it has in general in brackets.