Only Subjugation – because even Blindness can be easily removed by the General or a hero.
Besides, Subjugation will be too late, because even with the Spell Power skill, the hero will cast the spell only after 1-2 attacks from the Cyclops – this has been tested.

Ehh, no, my friend, let's do the math. Model problem: starting position on the Action Turn Bar (ATB) is 0.125 for everyone, there are no artifacts for initiative yet, or they are compensated by debuffs; the witches stand next to the Generals and have 13 initiative. Taking into account the Spell Power skill, the hero starts from position 0.375 with 10 initiative. It will take 0.0625 units of time before his turn. The Daughters of Heaven (Earth) will be at position 0.9375. Therefore, our hero definitely goes first. Let's complicate the problem: let the Orc have an effective +10% initiative. But even then, the witches go at time 0.0616. There are 0.0009 units of time left before the hero's turn, during which even the General, whose initiative has been increased to 17.16, is at position 0.125+0.8131+0.0154=0.9535. In order for the Cyclops to attack once (go twice) in this situation, all 3 stacks of Generals must go earlier due to the random factor, or 2, if all the witches have been slowed down and pulled the hero forward – this is unlikely. And your army was wiped out by Cyclops because you were playing with 3 native cities, which is exotic in itself. Therefore, taking into account 3 buildings and Blood Memory, the Daughters of Earth start with 15 native initiative, and the Generals with 14, but even with 2 castles, and taking into account the number of races, it is not worth taking this into account in the general calculation; such a trick would not work. Of course, this tactic can be implemented once if the Barbarian has a lot of items that increase initiative, and the opponent does not have a Staff.

Yeah, Berserk would be very useful when the Cyclops are already near our ranks.

Very useful, because either the Cyclops remained CLOSER to their own side on their first turn, or archers and all other units attacked them with full force, and, as described above, they will not always go on their second turn. Moreover, you can survive 1 attack from the Cyclops, but under Haste, even if Subjugation is cast on them, they will still go very often and deal many more attacks, but not to us.