I was'nt aware of any drop percentage favours given to lower level avi's until I read a post a few minutes ago

Energzeric said :
I actually just noticed this tonight. I turned xp lock on to stop my character from going from lvl65 to lvl66. I did this so that I can continue to farm humania for lvl66 items and have the best odds of getting pink drops there. So for me, I'm a lvl65 farming humania and I don't get credit for kills.

So is this true, and if so, then what else am I missing out on. What else effects drops.
What does Shamrock ale elixir actually do?
And if I do a boss heavy levellike Nuri Funhouse, will I have same drop chance as the bosses in normal levels?

Thanks