But doing them all together would be almost impossible, short of working on a supercomputer
Packbeast is only good when you wind up with a focused deck, while the removal spells (like the various Exhales) are good no matter what your deck looks like
Aether Vial decks, like Death & Taxes, put themselves far enough ahead to leverage that mana denial
EDIT: Coincidentally someone asked a similar question about those dots yesterday: www.elitefourum.com/t/black-spots-on-the-reverse-of-a-card/28205/1 Greetz, Quuador Potentially yes, if they feel the dots were being used to mask damage
The current price is only $0.29 (mtgstocks.com), and I do not see how it's this low
Note that things chosen to proliferate get one more of each type of counter they already have you can choose the players and objects, but you cant choose which counters get proliferated