To cut short about this topic, I suggest removing Empress, Root Abyss, and Madman gears from the Marvel Machine and Philosopher Books. I honestly cannot see the reason why we are spending roughly $2-$5 for these items when we can easily obtain in game. Unless these items are completely difference from in-game like... Chaos version of it/etc.
I can understand that nobody have to disagree/agree with me on this topic, but at least give us something that worth spending on.