I think you may have to cast Decoy + Reverse on this one, in order for Yiazmat's attacks to heal you and focus the lionshare of his blows on one character. But you'd have to wear low-resist armour to bring about the status effect consistently.

Should you decide against this, then it might be a good idea to turn off your buff gambits so that when characters are revived, their first course of action is always to attack.

To sometimes make Deathstrike miss you, cast Shell on your party or equip a Shell Shield to the targeted character.