Hand Size One of the basic rules of Epic is that you start with a hand size of five cards and at the end of your turn you must discard down to seven cards
P/T Number 4 Language English Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (6/16/2023) The creature card you choose doesn't need to be a card you milled
I know this sounds obvious, but learn how your cards and mechanics work
Yshtola, Nights Blessed, and Graha Tia, Scion Reborn are the face commanders
However, I agree with you that Burn is still a popular deck because it is a budget option, and you should be prepared for it when playing a Legacy tournament
We're not as all-in on a single strategy like Mortal Combat or Epic Struggle that way