There is already luck in some fights where the boss flips a coin to decide what to do, and one of the options is usually easier. Did that have such an impact on world firsts? I think not. All the top raiders are about equal I would say, they should be able to deal with both easy and hard outcomes of the coin flip.
Flip the coin enough times, and there's no luck involved. Good parties will know how to react to any outcome, even if all the outcomes don't appear in the fight.
I did post this back then, not much interest though. Basic idea is that you put all the boss moves into a lottery and draw them without replacement so you still have to know how to react to everything (and that how bit is usually easy like moving away) but you can't memorize the order that they come in.
http://forum.square-enix.com/ffxiv/f...threads/219760
