Gholdengo EX And Energy Search Pro Never Too Much Energy All Ace Spec cards provide some of the most powerful effects in the TCG at the cost of only allowing one of the card types in the deck, and some of them synergize really well with specific cards
I always throw in bonus gifts as a thank you!
For Japanese collectors buying from Rakuten Books, there are some differences in sales price, sales period, shipping schedule, and bonus promo card handling compared to the official US sales site, so make sure you confirm all of the details on the product page before purchasing
Convoke can also pay for colored mana
As creatures you can sacrifice to protect your board, this Spider-Man and Boromir should be fairly interchangeable unless you have specific synergies or flavor reasons to run just one of them
The biggest issue with Aura commanders, in my experience, is you only suit up one creature, and if the creature gets removed, its over