my opinion is that you should use a deck with basic stuff, not many rare cards and the kind of stuff you would expect a starting duelist to use, of course add a few strong monsters but nothing really strong...like 4 star monsters with around 1400 attack for your basic monsters.... etc....thats what i would do, and see how well the person your testing does against it...after all, its not so much the deck, as it is the duelist, everyone does it different...