Monster Spawns Based On...??

I'm not sure if this should be or would be considered a bug, so i will ask first here.  I was under the impression that the type of monster spawned outside your towns that are not your primary, is based on your hero experience level or the amount of experience points your hero has accumulated if you did not have the chance to level them up. 

My first hero, Leeana, got all the way to hero level 19 before having to face those awfully repulsive worms.  Even then, they showed up in my fourth town just after the dragon update. 

Today, i logged into my secondary hero, Carolyn, who had not even had birdcages yet to fight to date as her level is 13 (can meditate to level 15).  Today, in my fourth town with this hero, i had BOTH worms and birdcages.  First time ever seeing birdcages for this hero, in addition to the worms.  It doesn't seem right.  This hero is not anywhere near strong enough with research and everything else to fight either. 

Could anyone shed any light on this?  What exactly is the spawn requirements of monsters?  It would seem to me that my second hero is facing monster that only my first hero is meant to have.  ?? 

Thanks berserker.  I guess i'm just not looking forward to having these worms all over the place.  You've done a great job of making them look awful.  lol 

Is the freq higher for larger number of towns or lower?

hey there berserker.  I am thinking there is definitely something going wrong between my two heros and the spawning of monsters.

Today, my level 14 hero is facing a group of 6 small worms, each with a health of 1080, totaling 6480.  My first hero, NEVER experienced a group of monsters this strong at level 14.  The 'worst case scenario', was a group of 8 big muscards at 342 health points, totalling  2736.  

Could someone else maybe confirm that something like this might be happening?  It would be much easier to see if there is a bigger difference in hero levels.

I also got worms only around level 20; at 14 it seems much too early. I actually got them just before the dragon update. But I think the strength depends more on exp points than level ...? I did not level up my hero recently and the monsters still get stronger with each spawn. Also, right now it's mostly worms - before it was a mix of everything but then suddenly it turned into worms only mode - with a stray group of muscards or birdhouses. I definitely didn't notice monsters getting weaker... I'm not complaing though, it keeps me busy at least.

Somewhat related - what are chest requirements based on? I was reseaching my 2nd tech in medival and I got a small chest asking for 5 Bards. Ok, it's only five, but Bards are weeks away in research! And now this small chest with probably some wood or stone prevents me from getting new ones... I think this should be balanced more to take into account current tech development.

I get mostly groups from 5 to 8, max 1 big, but up to 5 medium in a single group. The strength is increasing steadily - I think only once there were small groups like 2 small worms. I very quickly got groups of 5-6 with at least one big or medium.

Lol, I take it back - it's not only worms. Today I got everything in the mix, including dragons. No way I'm gonna kill a pack of 5 dragons at the beginning of the medival age. But I think the strenegth of the monsters is off - today morning, when the first of my towns got monsters I meditated to lev 26. Now after the monsters spawned in the other 2 towns (and that included 4 packs of dragons, 3x3 and 1x5) and I killed everything except the dragons and the strongest pack of worms I'm halfway to level 29. If I kill the worms and level up to 29 now next time it's gonna be only dragons! And that's way off compared to my tech development... I get new tech every 2-3 days, monsters around every 2 days. If that gets me 3 levels up (I managed so far to kill most everything before the next spawn) that means I'm getting much stronger monsters next time without any improvement in the army quality. And if I end up with only monsters that I can't kill that means I have a couple boring weeks without much playing before I finally get a way to kill them...

 And if I end up with only monsters that I can't kill that means I have a couple boring weeks without much playing before I finally get a way to kill them...

I rarely kill monsters and never have a dull minute within the game :)