I've been playing all-random for several games now. I get Dungeon, and I play as Jebus. Of course, there's no Miner available. If harpies don't come, I don't go for dragons; instead, I upgrade Trolls and collect everything I can. Then, I can clear crypts with relatively acceptable losses. But with un-upgraded units, you can easily lose in minimal and dual battles, around 15-20 units. So, I need universal tactics. With a setup for the maximum crypt, I haven't lost fewer than 15 Trolls, even with a hero with Tazar, 5 defense, and an expert Armorer. That's how it is. You can freely add Gloom Bats to this tactic. I need an example without a Miner, as it's not always taken as the main hero.

And regarding other towns, the same applies. Also, I often try to take crypts in the same way, using a secondary army of Imps. The maximum crypt is very difficult to take because there's not really an army, but it's possible. In general, if you start something, you should finish it, and in this case, it's not bad.

P.S. I found a way to achieve the losses mentioned in the second post for the Tower. :-)