For the first possession run, I should've dug straight to the gold, or probably even left the Imp before the gold. It's possible that it also would be a better idea to immediately construct the lair and the library, so that Warlocks can be attracted. It's also a question of how many Imps would be considered a good amount. Finishing a 5x5 Lair and a 5x5 Treasure room is probably a good idea as well, as Dragons have a really high research skill as well. I panicked at @4:45, removing the skeletons from the heart. This was probably the biggest loss of this run. Also it's difficult to decide when to trigger the action point at the Heart, if it's done too early the whole run is botched. But actually the timing to get Cave-In was very good. When the Avatar drops, I could've put a big Cave-In at the position he would spawn, it would save some time.