You don't design lists on the basis of receiving crits.
But you can design a list on the basis of dealing out crits, and if you do so, you will be interested in what deck the opponent is using. Ergo, I suggest that each player gives his/her deck to the opponent. It stimulates aggressive play because you only have to consider offense. Whereas if you can choose the crits you might face, your only consideration will be, in a practical sense, how you can make the game last longer. That does not seem ideal for tournaments.