yugioh synchro cards Top 10 Strongest Monsters of All Time Synchro Monster | Yu-Gi-Oh! Wiki

Outside of the most obvious, cards with populate like Rootbound Defenses might be worth a few slots

Kuja, Genome Sorcerer / Trance Kuja, Fate Defied Strangely enough, I rather think Kuja, Genome Sorcerer is the better half of this double-faced card

Im not really trying to pay 2 extra mana for Guttersnipe, but what if we doubled the stats, let it Shock anything when you cast an instant or sorcery, then made it die into two turbo-charged Firebrand Archers

Access to a deep card pool

I wouldn't go out of my way to play this but if I found myself needing what it offered I wouldn't be unhappy running it

You can choose no gap for cards that are directly adjacent, 0.2 mm as the default for general use, or 3.0 mm to allow for a bleed area