Instead of directly inducing those without morale damage, you could have the weapon do enough morale damage to set the unit to 0, then have a script that restores the target's morale after they panic or berserk.
I thought mind control didn't do anything to unit morale. Anyways, MC + Panic can only happen on the same item if the item is a psi-amp and you have either normal panic attack or a melee attack that does morale damage. They can't happen together on a projectile item, only the morale thing can.