Here's my own entry for the "Challenge".
In this game I wanted to test the Sorcerer's Wraithblade for our Dreamwalkers. To do this I needed a supply of Orichalcum for the swords themselves, Bloodsteel for the bladeshard ammo, and also Dreamwalk Talismans. The talismans just require any orc to spend time Communing with the Spirits at the Altar, so I queue'd up 90 of that reaction (-> 9 talismans). From the huge battle with the Dwarves I had plenty of materials for bloodsteel, just had the manager put in matching sets of "Extract blood", "Burn remains to ash", and "Make Bloodsteel" into his ledger. Orichalcum though, we can't craft initially, and I didn't want to wait to import it. So, I set the Raiders out to Raid Ancient Ruins about 6 times, figuring on average we'll get 3 successful returns each with several bars. To conserve wood for the forges I asked the raiders to use Xebecs rather than longboats; we have plenty of craftsorcs to make the pulleys and cloth for the lateen sails.
Luckily we got not only the Orichalcum bars that were needed, but an enchanted sword from the ruins as well.
I decided on crafting the Wraithbinding (i.e. Fading -- sorry I used different names for the spell at different points) shards, which not only apply a disabling spell but also should have a chance to turn the victim into an Undead, hostile to all life. The dreamwalkers tested their new spellcasting blade on some captured Dryads, no doubt Elvish spies; and then on Trogs in the crystal caverns.
The Bladeshards were fairly deadly as projectiles, but unfortunately I wasn't getting a lot of "stuck in wound" procs which would trigger the spell effect. I may need to rebalance the material or projectile properties a little bit.
For the one-year anniversary of the "Challenge," at the next Dwarven siege, I decided to do my best to stage a re-enactment the battle of The Five Armies. That is, built a ramp down through two caverns to the surface and simultaneously throw all the gates open to release: Dwarves, Golems, a Web-Spinning Forgotten Beast, and some Troglodytes.
Well, to be honest it didn't have *that* much like the Battle of Five Armies, I was just reminded of it by the Dwarven Spear-Lord fighting to the death in a close-packed square with 8 of his comrades. By the way: Spear-lord with a welded mithril weapon and slademantine armor is no joke. Especially because his friend the Dwarven Crossbow Master arrived with a javelin thrower and cleared the entire battlement of bow- and rifle-orcs which would have turned the battle much more strongly in our favor. In any case, this unconventional assault from the caverns at least snapped the Dwarves out of their Siege standing and provoked them into a glorious battle, as is proper.