This deck included Jeleva, Nephalias Scourge, whose mechanical experiment involved caring about how many mana you spent to cast your commander, with a back-up being a real boogeyman: Nekusar, the Mindrazer, a card that would go on to define the Wheels archetype
3 Red: Krenko, Mob Boss The Goblin Horde Comes As you may expect from mono-red, the best mono-red commander is one that is very aggressive - one of red's biggest traits
Not only is that okay, but that is recommended as having a card with multiple purposes ultimately gives you more flexibility to react to certain scenarios and bring synergy to your decks theme
As for the card themselves, Kinjallis Caller is incredibly straightforward, they make dinosaur spells one mana cheaper
We accelerate this growth by playing cheap spells that become multiple bodies, like offspring creatures from Bloomburrow or Resolute Reinforcements