Yet another example of why this game is so confusing. I just handed the letter to Lohar, and when I get back to Julian he keeps telling me to find evidence. Had I not read online guides I would go back to the dwarven base and run around hours looking for the item. Larian tries to give options but is really bad at ending the quests. Too many loose ends.

You can avoid combat with the other patrons in the underrtavern if they dont see you are in combat. However keeping the 4-5 enemies in lohars room gets crowded.

The easiest way to do this is to teleport lohar to the area where dorotya gives you the spider kiss. (It seems you can teleport him multiple times without him becoming aggressive, but you can stand in the doorway and move lohar with one cast to that spot) then run down to him and initiate combat in dialogue or just attack for a preemptive strike to begin the fight. It will take his goons a few turns to reach you giving you enough time to dispatch lohar. Just continue to pass your turn and stay in that little space where you get the spider’s kiss. Kill the goons when they get to you.

If done right, none of the other patrons will have joined combat and after the fight, their icons on the minimap will become yellow again.