I got tired of ending my key runs with no keys to add to the collection. I don't mind the extra time it takes to get 5 stacks in mp8 if I'm getting keys nearly every run. I tried the whole speed runs through mp1-5 but wasn't finding as many keys as I would of liked. It does suck doing 5-10 runs and only having 2 keys at the end of it all.
I'm reaching up and reaching out, I'm reaching for the random or what ever will bewilder me.