These pictures do not tell us much about anything, since they do not contain information about the conditions of the battle: buffs, debuffs, equipment and so on.
It's the nightshade. It doesn't have equipment.
Furthermore, it had full buffs for p.def (even no zerk for more p.def) from SM.
And debuffs? I don't know for sure but every game it takes this dmg vs multiple PK enemy. Also, PK buff augment vampiric range so no DM active for this dmg.
On the other hand, nightshade takes 100% judgement and aggression, so it is safe to assume it has them.
Taking into consideration that PK reach 1200+atk spd on AI+FI is really normal to not be able to defend pet? Even if i use pet UD, it takes 2.5-3K dmg in seconds.
I mean every game vs PK is 100% lose because it just kill pet in 5 seconds even if i try to heal or use UD then he hit me 6-7k or 2k with bow...