Goblin

Silvanna: Attack

You can only die here once in a blue moon.. so its very rare (there is an achievement for it)

Mushroom

Silvanna: Attack
Zena: Defend

Mordina

Silvanna: Attack
Zena: Defend
Eleanna: Heal

Kraken

Silvanna: Attack
Zena: Defend
Eleanna: Heal/Attack
Mordina: Skill

If healer runs out of MP then use the mode switch skill and then land the final blow with Zena's skill

Multi-Eyed Monstrosity

Silvanna: Use Skill to switch mode then attack
Zena: Skill
Eleanna: Attack
Mordina: Skill

I don't think you can fail in blinding him.

Death Ravager

Silvanna: Use skill to switch mode
Zena: Skill
Eleanna: Cure poison (If poisoned)
Mordina: Attack

Silvanna: Use skill to switch mode back
Zena: Defend
Eleanna: Heal
Mordina: Attack

Shadow Mordina

Silvanna: Attack
Zena: Defend
Eleanna: Attack
Mordina: Skill

If poisoned then

Silvanna: Use Skill to mode switch
Zena: Skill
Eleanna: Cure Poison
Mordina: Skill

Silvanna: Use skill to mode switch back
Zena: Defend
Eleanna: Heal if needed
Mordina: Skill

If she puts up shield then you need to switch mode and use Zena's Skill to break it

You can be very unlucky and have the boss crit you.. there is nothing you can do to prevent it.

Undead Unicorn

Silvanna: Attack
Zena: Defend
Eleanna: Heal
Mordina: Skill

You can be very unlucky and have the boss crit you.. there is nothing you can do to prevent it.