Kefkas Tower Bolas's Citadel has a tough mana cost and doesnt do much the turn you play it, but it can offer runaway card advantage
Between Wear // Tear and Ajanis Presence, I dont recommend going more threat-light than that
Not only do you need the pod and the dork and the things to make that dork cheaper compared to their CMC but you also need a target with the exact CMC +1 of the thing you ditch
Bracket three is where most "average" Commander decks are, whereas bracket four houses decks that are very strong, but not quite cEDH tier
For example, if two creatures you control with lifelink deal combat damage at the same time, Enduring Tenacity's first ability will trigger twice and you may choose a different opponent for each trigger
Sanguinary Priest is a unique take on the Blood Artist effect that can also deal damage to creatures and planeswalkers with the Blood Chalice ability