I think mono life decks can do semi well in plat if you build them right or perhaps you could have built a adrena/mitosis pests deck with the emerald towers. That might have done okay.
i feel like a deck like that is too slow to rack up damages, the quanta drain is good, but against swallow u wanna be really aggressive or u will end up by losing, without counting that i should fuel the pests with the mark, in the best scenario i can play only 1 pest after turn 2