Hello guys! I have some thoughts about %Endless difficulty. I think it will be fair enough to choose the 5th level as a rule. First of all 5th level gives you about 3-5 elites and bosses till wave 20 it means that you will have 3-5 red boxes in your run. As for me the main idea of %Endless to combine your items to get unique itempool and make a nice build. And on 0 level you will get 1(??) red box so you will have only 1 red item and your build won't be rich.

Thank you. Sorry for my english :D