Fighting loki causes a crash not long after he switch place

[gempepaine]

As a last resort , you can disable his fiery hexes in loki.atom file

wave {
class=scripted
script_attack=loki_boss_wave_attack
ad_factor=1
custom_params {
damage=200-300
typedmg=fire
stun=0
traps=7 (replace 7 with 0)
time=1
}
}

At least this way , you can still have a fight with him.