I did this with Celine, you may find alternate ways. My SP was around 200 when I did this
boss. Use the charged magic shot and the charged ice shot or fireball, and you should be
able to nail this boss fairly effectively. My weapons that got me to this stage were a
rapier-type weapon of Counterattack (ALWAYS have, if possible, this ability is solid
GOLD), and a ranged weapon of rupture (greed is good too). It helps sometimes to revisit
the forest of embracing and defeat the forest boss again for more items, if it's too hard.

But yes, the Auto-tracking spells such as magic shot are great for tracking down squirrely
foes, such as wizards, the horde foes (scorpions, bats, rippers, etc), and the 2nd boss.

I did this with Raginer. I found out in his last form (its hard to see) but he puts off
small "puddles" that poison you and cause you to stop attacking so try not to follow him
directly in his path he will try to turn away for you so you have to follow behind him but
hopefull this will help you.

use ranged attacks and when he gets close use ur sword but if hes about to attack use dash

My best person used to defeat loki was I used Kendal but he was at level 21 when I used
him.