Tourney-organization seems to work great in spite of many people, not really knowing what is going on, asking questions all the time, getting confused about rules/procedures ... thanks.
One thing I didn't really know about, and which should be improved asap, is "Deckbuilding rules".
Reading the tourney-OP and the general tourney-rules did absolutely not clarify what "Only the elements XYZ are legal. Your mark must be one of those elements." actually means.
In this writing it kind of suggests that the mark defines the element for this tourney.
Now I know that there has been a thread about this a while ago, stating that the element of the actual cards defines the deck-composition, which is now used for the deck-boards to decide whether its a duo, trio, rainbow etc. ... I think this thread should be clearly linked in the tourney-rules, if it is to apply, or the specific meaning of "legal" etc. should be put down shortly in the tourney rules and/or tourney description again.