This rule was initially a bit confusing:
"- You must use at least 2 of your Battle Elements in each deck (To count as using an element, you must use at least 1 non-quanta card)"
Since it says "Battle Elements," it looks like you are saying that players must use 2 of the non-team, non-player elements (referenced earlier and called battle elements) in every deck, which would mean that you can't ever use your player/team elements except in trios. I understand now that this is not the case, but it's still very awkward wording. Changing it to "available elements" or similar would work fine as a fix. Alternatively, you could simply not call the non-player/non-team elements battle elements (random elements/whatever).