Alesha, Who Smiles at Death + Dockside Extortionist + Aggravated Assault + Yahenni, Undying Partisan

Decks

How it works

Declare Alesha as an attacker.
Alesha triggers, causing you to pay to return Dockside Extortionist from your graveyard to the battlefield tapped and attacking.
When Dockside Extortionist enters the battlefield, it triggers, creating at least seven Treasure tokens.
Move to your postcombat main phase.
Activate Yahenni by sacrificing Dockside Extortionist
Activate five Treasures by tapping and sacrificing them, adding .
Activate Aggravated Assault by paying , causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Move to your next combat phase.
Declare Alesha as an attacker.
Alesha triggers, holding priority, activate two Treasures by tapping and sacrificing them, adding .
Resolve the Alesha trigger, causing you to pay to return Dockside Extortionist from your graveyard to the battlefield tapped and attacking.
Repeat from step 3.

In which brackets is this combo allowed, per Spellbook's Banned tier?

1–2 · Exhibition & Core

Spellbook classifies this as Banned — not for these brackets.

3 · Upgraded

Spellbook classifies this as Banned — not for these brackets.

4–5 · Optimized & cEDH

Spellbook classifies this as Banned — not for these brackets.