Endurance is great against Lurrus of the Dream-Den decks, starving them of cards to bring back from the graveyard
1 Golgari Findbroker
Not only does this afford you with some versatility around your play style, it also virtually ensures you will find a one-cost character turn one no matter what
The idea of having enchantments that boost your commander is definitely an interesting one, assuming the effects and the mana cost on the card line up with what youre trying to build
Secret Lair x FINAL FANTASY: Grimoire Secret Lair Speaking of locks, you could offer me just about any drop with five of six cards being in the EDHREC six digits and Id be interested, sight unseen
Sure, you can combo it with cards that put extra counters, but if you can dedicate that much resources to one card, you can dedicate those resources to other ones that win you the game on their own, rather than relying on a combination of cards