Silly combos
Casting Cost: Card Type: Legendary Creature - Human Power / Toughness: 3 / 2 Card Text: Haste Whenever you cast your second spell each turn, untap target creature, then investigate
Doctors and companions work together using the Doctors Companion mechanic, which is a variant of Partner, allowing both the Doctor and their companion to operate as commanders from the command zone
And while Equipment is more popular with her as is always the case with commanders that benefit both with Auras and Equipment (people simply love Equipments), I believe Arna is simply much stronger focusing on Auras for two main reasons: The best Aura cards are far less expensive $$$ than the best Equipment cards which is important for this series Even ignoring $$$, Auras are simply a stronger archetype than Equipment because they are way faster at doing their thing not needing to pay for equip costs AND the cards themselves are stronger, with Aura-specific powerhouse cards like Retether and Winds of Rath having no Equipment-specific equivalents at all (Mantle of the Ancients is shared by both archetypes and is better in Auras!) So to give you the most powerful budget brew I'll be sticking to Auras
This background is most popular in dragon typal decks with Miirym, Sentinel Wyrm as their Dragon commander, or as the background for a Ganax, Astral Hunter deck
The answer, probably, is it depends which format we're talking about
