ok, buy the 3/6 card immediately at nar shadda...
if you fill up all nine draws on a round, YOU WIN AUTOMATICALLY!
and since you draw first, you're always going to have a chance to fill up all nine draws before your opponent...
if you have several 3 or 6's in your draw, and your opponent has already made 20, play it, and immediately all your 3 and 6's become negative...dropping your points dramatically, then keep drawing until you've drawn nine cards...winning automatically!!!
this also works if you have a lot of negative high value cards in your side deck...