is good, because it helps maintain pill advantage, and in a 4 round fight, if you stick to 12 pillz, it gives you 3 extra for the KO bonus.
is good, because it helps you counteract some poison, and maintain minor life advantage... keeps you alive longer, and can decide a close match.
As for the deck, there are a lot of good choices for cards, I haven't made a Deck yet using the newer cards, as i haven't bought any in a few weeks, or maybe even a few months...
but, if you look into the power of each card, and their ability, you can usually put together a pretty good base deck.
if you construct a base deck, and present it on this forum, you'll find that people are much more likely to give you usable tips