The payoff of this meld pair, doesn't win the game on the spot, and I'd stress that to your Bracket 3 playgroup because while this deck puts together powerful cards, it is not optimized to be unbeatable, and more focused on a huge play with some Golgari death and graveyard interaction molded in
Using them just to get a hit in is sometimes good, but not enough to warrant playing an otherwise useless card
Sure, Hedron Archive may be a relatively simple card, but sometimes, simple is best
Vine Trellis Llanowar Elves is an incredibly powerful card
If your opponents don't have a way to get Oubliette off the battlefield, it can permanently remove a creature from the game
[[nid:568973]] The 6 and 5 casting costs of the front and back side respectively are also reasonable and not much different, meaning you could choose to cast the robot side first, despite having lower Power and Bolster effect