I’m desperate. Clan boss help.

I know of Lore of steel, I know of speed sets, perception, how to use calculator. The problem I’m having is the turn order is fine. But around turn 30 my tatura is dying. I have him just slightly lower HP than my Helicath to avoid stun. But Heli shield isn’t covering tatura (which makes him die) around turn 30 because of his low HP. I have him with as much regen as possible without overtaking heli. Is there something I’m doing wrong? A way to get that shield on Tatura? Please someone