I think a build focused on blinking creatures is probably stronger, but that's why there are various planeswalkers, including Oaths, in the deck
Making a team of three 1/1s holds off most ground based aggression and usually gets value in the process
As for countermagic, saying no is another incredible move to make
I also really like The Reality Chip, which can come down early for blocking duty, and then when theres mana available, it can attach to another creature and let us start playing cards from the top of our library
While it does have larger decks than something like Standard or Modern would normally have, only needing one of any card when building your Commander deck generally makes the format more affordable, too
Ajani, Caller of the Pride Rarity: Mythic Rare TYPE: Legendary Planeswalker SUBTYPE: Ajani CMC: 3 Mana cost: USD: $0.58 EUR: 0.89 TIX: 0.02 EDHREC RANK: 4493 (4) +1: Put a +1/+1 counter on up to one target creature