When played in tandem with cards like Pitiless Plunderer, Vihaan lets you throw a swarm of Outlaws at your foes each turn, and any defeated out in combat will be instantly replaced with new Treasure
Many are trying to pull off Johnny shenanigans, like Prodigal Sorceror to grow a Fungusaur, or Tawnos's Wand for an unblockable Hypnotic Specter
If you need the mana immediately, grab Godless Shrine from your deck and pay 2 life so it enters the battlefield untapped
Many cards in Whispers in the Well have this mechanic, which allows a player to pay an extra ink cost to tuck a card under your character and activate a new, more powerful ability
Therefore it's best to pick a Mono Red Commander that itself provides some of the tools to address these weaknesses so you always have access to it in the command zone
This means you have to aggressively counter cards like Expedition Map and Crop Rotation