For ramp, red and white struggle to do anything more than generic mana rocks. But you can use Path to Exile as a kill spell, or if you're desperate on your own token for a land. Additionally it works well with Knight of the White Orchid to get you a plains, even when you aren't behind on lands. Oreskos Explorer is also daily helpful.

Cathars' Crusade would be high value for you, especially if you add or increase your token generation.

Monastery Mentor

Rise of the Hobgoblins

You should consider adding Lightning Greaves and/or Swiftfoot Boots, they're both edh staples, in particular in "commander-centric" decks.

Indestructible and hexproof, he basically dies only from board wipes.

Thanks for the suggestions BenW12 and DarkSepho. I cant believe I forgot and didn't think about those. Thanks for these suggestions, they mean a lot!

perhaps a Mind's Eye over Vanquisher's Banner and a Kindred Boon to hand out to key soldiers. Tragic Arrogance is like a Cataclysmic Gearhulk, but you get to pick what your opponents are losing. the Odric, Lunarch Marshal is handy for passing out buffs, and Odric, Master Tactician is great for combat manipulation. Mirror Entity is a great soldier that provides a great base stat change. Ranger of Eos is also a soldier and fetches some handy 1 costs, like your Legion Loyalist and Soltari Foot Soldier. Overall, cool deck. +1

Neat!

Tajic was my first commander too; in my case, I leaned much more heavily on board wipes (I think I was running around 10?) to clear the way, with the 'ideal' win-con being to use Worldslayer to land a hit against any player.

I'd strongly recommend adding an Assault Suit, as one of the few 'anti-sacrifice' tools available.