I do a lot pvm these days. I remembered i have seen a software that can show dropped items after you killed a monster in game. So it helps saving a lot time right click and check, etc.
RsBuddy would be your best bet.
If you are willing to pay £2.00 per month, you get alot of features. (ITS NOT COMPULSORY TO PAY, HOWEVER, ITS RECOMMENDED FOR "PVM'ers")