We don't need to all get the same amount of items, we just need a pity rate.

It's fine to have a slight variance of the amount of items everyone has, but when i don't get an item from a unit the chance the next unit drops an item should increase which should in turn close the gap between getting 0 items and getting 5+ in the fight round by increasing the amount of items you get on the low end without decreasing the amount people get at the 5+ end.

This is a very simple problem with a very simple solution (hopefully)