You have lifelink, so buffing Tevals power and attacking is a good way to gain life, or you could use the black drain life effects to offset your life loss from casting spells
New Mechanic: Manifest Dread Manifest dread puts a new spin on the manifest mechanic
One thing that the Cavalry has over Craterhoof, at least in a vacuum of single color identity, is that White does get a smattering of blink and flicker effects, making this card far less survivable in the long term if it can be used again and again
Few layers of paper also work
Yarok, the Desecrated - The ETB King Key Cards Yarok, the Desecrated is what happens when you take a normal Sultai value ETB deck and crank the absurdity up to eleven
Creature - Human Cleric Color tag templates(None) Nezahal, Primal Tide This spell can't be countered