Impossible, Mage - No unit loss.

[Vilk]

About the Kraken I not only used Cursed Ghost, Horseman, Archmage, Inquisitor and Royal Thorn but also used a precise tactic:
- Horseman attack almost only the Kraken and almost always stoneskin level 3 and some times also the Archmage Shield.
- Cursed Ghost attack the kraken when the stack was high and fish when the stack was lower in order to increase it again. I didn't use any protection spell on them.
- I used only few flame arrow level 2, kept mana for other spells.
- I resurrect Horseman when stack was low enough to not lost resurrection potential.
- Archmage, Royal Thorn, Summoned Thorns was taking care of fish and of the Kraken when possible.
- Some Thorns stack also focus on attacking Kraken.
- Kill asap the kraken was a priority because if too long fish stack become too strong.