Thank you for the feedback! I'll try to go through each of the points you brought up.
1- Even though choosing brutal AI is more challenging, in much of the fight the AI gets command point capped and what is left for it to control is mostly the scripted units, so increasing AI's level won't make the game more challening to a big extent, exception maybe being use of Powers, heroes, upgrades, such things. However, starting with 6k (4k start) instead of the standard 3k (1k start) is a huge advantage, for it allows acquiring great upgrades early on, so it should be noted.
2- In a way, it is not meant to be exactly an horde map like the Edain ones, which are much harder and challenging. You just have to survive the shown time - so yeah, you can charge the enemies, don't need to necessarily feel besieged; I did not manage to rush the enemy base when I tried against the AI with 1k start, but in some moments I advanced my troops near the middle of the map, sometimes I had to retreat, and so on. Also, keeping Gandalf alive is also an objective - but I know that you would manage to do it in a second attempt, of course
3- I'm not sure what you mean about enemy forces being rarely seen. Perphaps you were expecting something more challenging, more similar to Edain horde maps, and you felt like something was lacking - but I've got no problems on scripts in all the tests I made together with friends. There aren't those huge armies indeed (I could of course spawn more and stronger units, but I did not mean to), but surely there are a lot of foes to defeat, I'm pretty sure the spellbook points can tell that
Just out of curiosity, my 2 friends (average players) tried the map, none could win it at first - one was actually doing well, but also lost Gandalf and lost the game; the second actually struggled pretty hard towards the last 10 minutes and was overrun. I did not have a really big challenge, but I did not find it very easy either and I was the one to actually create the map
we all went with the 1k start.
You, on the other hand, are a very experienced player, so even though your feedback is really important, I'll wait a bit longer to see feedback from other people - I'm sure many will struggle in the first time just like my friend did. I actually wanted this map to feel easier even for beginners to have a chance to win it and have fun, like by putting 4k start against easy AI with ring-heroes allowed; other players may find it better to play with 500 start against brutal without ring-heroes. If most feedbacks, however, are similar to yours, I can easily make the map much harder! Just spam some cool stuff
Also, the yolo berserkers are intended
I found pretty fun having lots of the on the field. Lastly, I could make Isengard base's defence better, but I think it is fine now; I also feel like the Ents spell is OP and will be changed in the future
so I won't mind about it
Again, thanks for testing it and feedbacking me!
EDIT: map updated - dunlending camp's reinforcements were buffed, friendly reinforcements were nerfed, spellbook powers now can't be used close to Isengard's base.