Best thing about this idea over dual pillars is that it really keeps with the dual deck idea...you can't have dual pillars + your mark for a trimark deck with these, which i very much appreciate. Mono decks are good because they're fast, but they are weak (essentially) because of lack of card stock. As you go up in marks, you get more stock, but less speed...this puts dual decks on a closer level to mono decks, while making tri decks require a lot more thinking... ++