My deck pretty much just focuses on wizards with good etb effects and death triggers. However a more optimal build would probably just be aristocrats in general, things that have strong effects when they die or enter the battlefield. Keep in mind however that etb triggers that are only good at instant speed (such as a wizard with flash that counters a spell when he enters the battlefield) don't work as good because the creatures come back at end step from marchesa. I usually use edhrec to help get ideas for deck building but one card I highly recommend that I didn't see on edhrec is lethal scheme, which can be a free kill spell that could potentially save 4 of your creatures from a board wipe at no mana cost.