Drop Rate related to monster life?

The only problem with that is that there is no such thing as a truly random number generator. There is either some algorithm, or an impossibly long string of predetermined numbers in most random number generators.

In c++ I coded a blackjack game where the number is selected depending on the time. It goes down to 1/1000 of a second. It selected a number between 1 and 11, and every time you restarted it it was different. Even if there's no completely random function, doing things like bait scrolling won't improve your luck.