Your mount can use its reaction to impose drawback on any melee attack directed at you. With Warding Bond, it might improve your AC further more even though absorbing half your damage. You may as well utilize a reaction to cast Protect for an additional +five AC if a thing https://triton-dnd47912.tinyblogging.com/tortle-names-dnd-things-to-know-before-you-buy-71923342