Your best strategy in a Dogmeat deck is to go wide, suiting up your other Dogs with cheap Auras and Equipment so you can generate some Junk and trade it in for more cards next turn
A High Market in the manabase, or creatures that have sacrifice abilities, or just an Oketras Monument to provide cost reduction all things that can enable Skullclamp
Even better if you have proliferate effects
Day 1 will feature the Last Chance Qualifier (LCQ), and the top two players from the LCQ will advance to Day 2, where they will compete against players who qualified through the regional preliminary rounds
This means of course, that the rarer cards are going to be worth more money, but which ones are currently selling the best online
This goes on until all are chosen