Acquiring Cards in the Magic: the Gathering Arena Beta Kotaku has given us some insight on how the Magic: the Gathering Arena (the next digital platform) will work
Then, anytime a creature you control deals combat damage to an opponent, you get to look at that card, exile it face down, and cast it from exile for as long as it is in exile
For two mana, you now have a two-turn win on board, assuming your opponent doesnt destroy it immediately
So i guess my advice is to cut-the-fat, and try streamline yourself for as fast a win as possible
Using Oko in combination with Oath of Druids and turning your opponents artifact into a creature to trigger Oath of Druids might put it in the conversation, but its still most likely weaker than the other two
If a Collector Booster has little to no chance of returning the expected value, most players will stay away