Ok so, i was playing the Dangerous Valleys single player map, and everything was going cool, except that all of a sudden everything was aimed at my town, monsters from lairs across the map were spawning and running off to kill my city automatically, so it went from a nice manageable scene to total chaos as monsters from every corner was closing in on my town, i had skeletons running around my city a minotaur destroying my mage guild, wolves out my butt, rats and ratmen harrassing my guards, and dragons messing up my marketplace! THIS IS RIDICULOUS, this has happened before in a few of these maps where all of a sudden everything knew where my town was and was making a beeline as soon as they appeared, i can't handle them all, whats the reason for this?
Yea that's because in order to control the flow of the game and to give the player a chance the lairs are set to not start spawning until a few days into the game.
On dangerous valley I played with a quick test a few days ago and a few self imposed restrictions (one of each T1 guild with no higher guilds and no towers). I also had some self made victory conditions and it took me a few tries (It's really hard not to loss a single hero ).
Anyway it got me to watching when the vampire and dragon showed up. They seem to show in the low 20s. After that they seem to come every 5 days. In the other post you mention there were TWO of them at once?? Either you got some weird bug or it's caused by not killing them fast enough. Monsters seem to keep coming and spawning so unless you kill them before the next wave hits you'll end up facing multiple waves at the same time.
I just beat the mission. In the end, my heroes didn't have any skills save for the ones you can research when you upgrade the guilds to lvl 2, and that happened after I have built all 3 temples.
Actually I think this is a mistake. The skills actually help improve your heroes a lot. A level 3 upgrade to palace cost 5K, A temple cost 3K, and two temple heroes cost 2K. That is a total of 10K to get out two more heroes. The upgrade for guild level 3 and skills for rangers is about 3K, the cost on clerics is 2.5K, the cost on rogue is 2.5K, and cost warriors is 2K. That's a cost of 10K right there which is a much better investment.
For the same 10K you get 12 heroes that are much better instead of simply 2 new ones. Don't underestimate the power of skills. Not only are they able to use them every few attacks but they have key effects that can really help turn the tide of battle. Stun on rogue for example is extremely handy. Ranger has two different heavy hitting skills on T3 one of which lowers melee attacks.
Also in your post you mention you didn't have any wizards which is fine. But my question is did you at least have the wizards guild? I know it sounds kinda odd but regardless of if you plan to use wizards you should still build there guild for two reasons. First is your heroes can buy the enchant weapon upgrade there which I know is not much of a boost but it's something. The second reason though is more important and that is it allows you to build the Bazzar.
Now regardless of if you think the potions in the bazzar are worth it or even if you don't bother to get them it is still worth it to get the bazzar. The palace upgrade to level 2 cost 2K and the market upgrade cost 1.5K for a total of 3.5K just to earn 100 more gold per day. Now in contrast the wizard guild cost 1.5K and the bazzar cost 1K for a total of 2.5K but you earn 200 a day from the bazzar.