Terra, Magical Adept // Esper Terra + Mesmerizing Dose + Rising of the Day

Decks

How it works

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Activate Terra, Magical Adept by paying and tapping it, exiling it and returning it to the battlefield as Esper Terra.
When Esper Terra enters the battlefield, its first chapter ability triggers, creating a token copy of Mesmerizing Dose.
When the Mesmerizing Dose token enters the battlefield, it triggers, putting a lore counter on Esper Terra.
Repeat from step 2 two additional times, from Esper Terra's second and third chapter abilities triggering.
Esper Terra's fourth chapter ability triggers, causing you to add , and then exile Esper Terra and return it to the battlefield as Terra, Magical Adept.
When Terra, Magical Adept enters the battlefield, it triggers, causing you to mill five cards and return up to one enchantment card from among them from your graveyard to your hand.
Repeat.

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

1–2 · Exhibition & Core

Spellbook classifies this as Spicy — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.