Mutavault solves that by dodging basically all removal, sitting as a land until you need to reanimate Otharri, then it just costs 1 extra to turn it into a creature
If you wanted to speed this up, however, you could always throw in some Goad synergy to force those attacks
Nissa, Vital Force looks to be a classic sideboard card for midrange decks, as her plus ability is great at putting pressure on an opponent and the minus is useful in returning another threat from the graveyard
You can quickly simulate different combat situations to make better strategic decisions during gameplay
Kintners Plains brings us to Frenzy Farm
Najeela, the Blade-Blossom Najeela, the Blade-Blossom is one of the strongest aggressive Commanders ever printed