We arrived in Ulgoth's Beard under invisibility (the closest area is thankfully just 16 hours away). I immediately walked south and around the outside of the fence. Viconia summoned two batches of skeletons there and used PfE on them. It's a spell she can cast once per day using the Rashemaar amulet we got from Winski, so she can save a level 4 slot for something else.
Shar-Teel took a couple of skeletons with her to confront the Cult Enforcer spokesperson. She opened up with bolt of biting but he saved. (The Enforcers are pretty dangerous as they cast spells and use wands of frost. I did not see any wand use but they may have (uselessly) done that on skeletons out of view.)
I sent in more skeletons as needed, and had my casters throw disabling spells. It was a pretty easy win. I now had free access to the inn, so I rested. The next outside batch of guards were pretty heavy with the basic goons, the Cult Guards. They are pretty strong opponents, especially those that used oils of speed or giant strength potions.
I used the doorway of the house to pull out a few enemies at the time. Funny incident with one of the assassins:

What is that, a "backpunch"?

The Wizard saved against three poisonous bolts before coming outside. Both him and Edwin cast Greater Malison. Skeletons surrounded the wizard and tore down his stoneskins, so he renewed it. Then Eddie got the last laugh:

After mopping up the indoors, it was time for the basement (shudder!). I made a mistake here - I though the Cult Guards would not show up until I had spoken to Tracea Carol so Shar-Teel had gone down the stairs fully visible (but with Protection from Magic scroll in use). This of couse led to Aec'Letec getting summoned right away. Shar-Teel retreated upstairs and only the sorceress and one guard followed. After suffering a few MMMs, Shar-Teel knew she would win easily:

Tracea Carol cast Invisibility and then stayed passive, so I brought in Viconia for an Invisbility Purge. Shar-Teel went downstairs again. I did not know if PfM scroll stops the demon's death gaze or not, so she waited out the protection effect and drunk a mirrored eyes potion before starting to work on the guards. My version of SCS claims that the guards can fight back, but that is only true if you melee them. Except for the one that managed to climb the stairs earlier, they are rooted to the spot, and they can't even call for help. So as long as Shar-Teel was out of sight of the demon, it was simple target practice for her. The guards have good AC, lots of life and healing potions so she needed something like 180 bolts to kill them all.
She buffed with speed oil, giant strength potion and another mirrored eyes potion. Ready to be showered in one of those annoying 'Vamp Touch from range' abilities this beast has, she braced herself for what would happen next:

Oh wow, didn't expect that. Sweet!
I accepted Hurgan's hammer as reward, sold it and a few more trikets at the inn and bought a 5-charged Paralyzation wand for 28k gold.
Edwin was now only about 3000 exp from reaching level 11. I wanted him to have that for the final battle. No so much for the extra spell slots, but to make his Remove Magic more likely to work. I decided to go hunting respawned monsters in the sewers. But first, a visit to Blade & Stars to celebrate my demonslaying hero and to pay homage to one of Frabjous' cool anagrams:
Shar-Teel Dosan - Trashed on ales7 Carrion Crawlers in east sewers, a couple of assorted slimes and jellies in the central sewers and six Phase Spiders in west sewers were killed. I reached my goal after the fifth spider:

Shar-Teel must have been really hammered here. She was still pretty good with her backstabs (inherent backstab bonus and her superhuman STR helped, of course) but she was a lousy archer. Probably worse than when she was a level 1 Thief! Eileth had to help out if I was ever going to safely get those spider kills.
Only final battle left now, but I was hesitant to do it since I have grown to really like this gang. I am not like some players in this thread who do super fast runs. My campaigns take many weeks if I am succesful. Very much a 'completionist', I am.
Oh yeah, Coran's quest is still left to do! Some final (game) days with the gang before the last showdown. Went to Cloakwood to pick him up, but he wasn't there. Ah, maybe I used him to get the wyvern head payment from Kelddath and then sent him to an inn? Yup, found him in Nashkel.
My main character is not evil enough to hand over Coran to an abyssal temptress, so I decided to fight her. What to use against her? She is highly magic resistant, so an MR spell from Viconia must be a good opener. Getting her MR down from 'very high' to 18% must be a good thing. Imoen and Edwin loaded up on Magic Missiles and Melf's Acid Arrows. I've been succesful with the latter earlier - if she is hit by one it will deal damage even when she goes ethereal. I have not ever been able to hit her with any weapons. I know +2 weapons are not good enough, and for some reason, MMMs are also useless. Probably fire immune, considering her origin. Hmm, what about this 'Root of the Problem' club? It's +3 against unnatural creatures. Seems to fit this opponent. None is proficient with clubs but "Wonder Woman" should be able to handle it just fine. The only other non-cursed +3 weapon I have found is the Short Sword Slythe was using (and I've sold that one).
Conjured up some skellies, Prot. Evil + Haste. Negative Plane Protection for Shar-Teel and off we go. Yay, the Root works:

Oh crap, I forgot that she plays male characters like puppets! Good thing Eddie only fights.
Things are not going well here:

I think Viccy managed to hit with the Magic Resistance spell, but Amelia has still MR-blocked everything else we've thrown at her: 2x Melf's Acid Arrow, a Poison spell and Wand of the Heavens (WoH was probably stupid but I was getting desperate). I had her down to Badly Injured earlier, but she's back up to full now, Shar-Teel has been drained a level and Edwin does not have many Stoneskins left (I simply can't keep all those skellies from him, especially since he runs after them under Haste and tries to punch them).
Shar-Teel drank a Storm Giant Strength potion and Imoen switched over to Magic Missile casting. Much better, most of the MMs hit and then Shar-Teel scored another critical:

This really is an interesting opponent. Not much life but very hard to damage and with fast regeneration.
I still had the problem with a Dire Charmed Edwin. As you can see in the last screenie, he is out of Stoneskins and a few seconds later, his life got down to half before I could pull the skeletons away long enough. Viconia tanked him to keep him away from the skeletons. In fact, she helped him more than that:

I had tried Dispel Magic earlier, to no effect. Viconia had one more, and this time it worked:

Now there really,
really isn't anything more that keeps me from the Undercity temple. I am scared since I have only played the SCS add-on once before, and that time I had Faldorn that summoned two powerful and long-lasting allies immune to fire and normal weapons...