You need to maintain a spreadsheet of all the Rares and Mythics in the set, have it open while you're drafting, and update it after every Rare/Mythic pick
There are a lot of useful Rats you want to stick on the battlefield, and Swarmyard helps make your opponents require two removal spells if they ever want to take care of a Rat
When it comes to what to board out, I typically cut the Spreading Seas first
Level 1 alone gives aggressive Red decks a repeatable way to filter their hands while following their usual game plan: swing first, ask questions later
However, a Sylveon could still deal super effective damage to an Eevee if it knows a Fighting-type move, such as Double Kick, which is super effective against Normal-type Pokmon
Although if you can get one, treasure it as Star cards are highly sought after and feature gorgeous artwork