First, you can cast Jin-Gitaxias, Progress Tyrant
The Link Monsters that time either require 2 Monsters or 3 Monsters for their Link Materials
I recommend as well checking GhezziTCG channel on YouTube, by far the best resource online on the topic
Spells begin to get flashy here and creatures have to have an impressive board presence, as you must invest a significant amount of resources into them
It's also noticeable that these cards all draw a different amount of cards and all fit different niches into a given format, so I wouldn't be surprised if they did away with effects like Marnie and instead put this "cap" on the power levels of supporters going forward
The planeswalker costs six, for an okay 5 loyalty, and +1s to draw one from your top two and then -1s to untap four permanents like lands for Stasis or stuff