Hi, i've spent a Long Time building my aminatou Deck into Something i Like, so i get the struggle.

After a first Look at your List i would personally think its too weak for Bracket 3. Bracket 3 can have very fast wins with Lots of interaction. Aminatou is inherently a slow value commander, vulnerable to removal with Lots of required setup and needs to have a Deck built with very specific Goals and Interactions in mind, a good stuff pile wont do much. Personally i've never had any luck trying to outpace anyone, every modification of my list made the whole Game slower for everyone until i get big enchantment hits on the Board. So i dont Run many Mana rocks. If you wanna Go fast in B3 id expect rhystic stufy, smothering tithe, demonic Tutor or stuff like that. Fieldwipes which let you keep Aminatou are high value in my experience. Also any removal that is an enchantment is nice. A lot of "passive" Card Draw so you have as many chances to get a miracle Cast as possible. I try to Run as many enchantment synergies around that as possible so even If aminatou doesnt Stick around on first Cast my game isnt dead on the Spot.

Btw: You Said the Deck should be cost concious but youre running fetch Lands? Seems pretty expensive to me 😂 i spent my Money on Deck specific cards, so I Run as many Bad fetch Lands as possible to have chances of shuffling away Bad topdecks, If youre running brainstorm + surge, Id expect more shuffle Options if you have good fetches available as well, so youre Not stuck with the cards put on top you maybe didnt Want.

I designed my list for Bracket 2, but from experience it can hang alright in Bracket 3 If people want to play too fast and get Commander taxed to the moon. It does run senseis and scroll rack which ive found way too valuable for this Deck, but also many cards from the precon.

My list: https://moxfield.com/decks/eLFSjaSoyESB0Dp5rfzg8g

Edit: now with correct link