Go to [-22, -3] from left side
Arrive at [-22, -3].
Go 1 map right (bet you didn't see that coming)
Click on bonfire.
Tips on fight:
the enemy has a pretty large jump, cast on first turn with a cooldown of 3 or 4
don't bother hitting the summon, it'll respawn anyway -- ignore it completely -- don't even think that bats eye helped me
try to keep the enemy away from your ally in a way so the enemy can't hit neither of you, but once she ends her turn, your ally can hit her - repeat for easy success (enemy had 7mp afaik)
%health heals are really nice for this fight, use your curative arrow if you're a cra and just stand behind your ally
stay relatively close to the ally - she grants you a damage boost which can turn the tide of the battle (cooldown of 2 or 3 turns)
your ally hits high if she crits - use critical shooting on her