If you're looking to play Mill as competitively as possible, this is where I'd start, although splashing into white is another option that offers potential
Holo cards feature a shiny image that adds extra flair, while Reverse Holo flips the effect, making the card border shimmer instead
Farmer Cotton You get the best of both worlds token-wise with Farmer Cotton
So long as you have a means of reliably returning lands from your graveyard into play as well as sacrificing lands as needed, you can make Glacial Chasm the bane of your opponents' existence
This set should be approximately 80 cards big before secret rare cards, making it much smaller than other sets coming out soon
You can absolutely bring MTG proxies at FNM right up until the moment FNM is actually being run as a sanctioned event and the tournament rules show up to do their job