I know Light did a lot of strategizing and deck-building in chat, was that the case for most other teams too?
Also, what was your strategy in building the vault?
We started off just trying to build good overall decks and then realized partway through that the better route for us was to build specific counter-elemental decks. Maybe a more interchangeable deck-building system would be better for an element with lots of options, but I don't think Light really could do that.
I don't know if that was the best way to do it, but things worked out pretty well for us until, obviously, the end.