Another slade tower, 11k goblins, 5k trolls. I know I could've edited the site to cap the population, but I wanted to see how manageable as it was -- not doing that again. It was very slow going through the trenches. Even flying was slow, ~5 sec to start a jump and ~3 sec of hangtime per tile. At one point active units got up to ~1100, it came down to ~600 as I approached the tower rhen dropped to ~450.
It was still very laggy due to the troll riot and goblins running around hysterical, even the soldiers. Only 2 had the presence of mind to confront me on the way up, and that was after I introduced myself to them. When I got to the top, the demon was repeatedly beating on an unconscious troll hunter with a human bone earring. It was taking so long that after mapping out the top floor, I picked up a scattered bow and arrows and practiced by shooting 2, and the demon was still hitting with that one attack and only bruising. So I tried to wrestle it away from him and naturally failed, so I tried trading him a divine warhammer for it. That worked, but the first thing he did when he got his new weapon was to finally use his stinger, the one that was attached to his ass this whole damn time.
After that was done, I called his name, "The Dangerous Whisper", and got him to follow me to the bottom of the tower, doing all the dirty work of killing goblins whose names I didn't want to sully my weapons with. No portal, yet again, so I wanted to see if I could make my own staircase by deconstructing the floor and constructing downstairs through the slade floor. The intervening floors turned out to be gabbro, all the way down to z-lvl 0, but I think the principle will work with slade; build downstairs, deconstruct the wall underneath through it, then build connecting stairs. Then dismantle walls all the way out to the bounds of the fortress.
My demon got killed by the first demons we met. He charged some thrips devils, got bitten by a flying devil and shaken around without too much damage, but after I killed them all he dropped 1-zlvl to slade cavern floor and his lower body was pulverized by the impact, probably due to his extreme mass. After that I found Fiends of Soot, one hit wonders, and fireball-hurling Mongoose Fiends. One hit me and I used up my water putting out the fire, so I left to refill and wash the ichor off of me. My upper body fat is only partially melted now, so I guess I'm not fully fireproof yet.