Personally I think the Aiel should be really powerful, low cost to recruit men. They also shouldnt have a crappy income due to their trade with the unknown east. As it really comes also Aiel are obviously beatable. Look at all of the battles in the books between wetlanders and aiel. Yes you could say the Aiel war where it took like every nation to beat them but here are some examples to why I think they are not as tough as thought.

Stone of Tear: it says over and over again how the Aiel took the stone, yet they really didn't. They managed to infilitrate it and most likely took key positions and caught the Tairens off guard but they didnt completely take the stone! After Rand drew the sword they simply stopped fighting, the defenders at that point were starting to show up in large numbers and better prepared than the first men the aiel faced. Personally I dont believe they would've taken it, the Tairens knew the stone better and would've used the knowledge of the fortress to their advantage however long the battle drew out.

Siege of Cairhenin: As far as numbers go for this fight it numbered some 100k for Couladin, 200k for Rand and another 40k at the most within the city most likely less. In this fight which the wetlanders again were not quite prepared they still managed to hold the Aiel out of the city even being vastly outnumbered. Couladin knew Rand was coming behind him and knew his only chance was to take the city asap, yet the wetlanders held out.

It is simple to compare the two, Aiel are so dangerous because of their constant warfare among one another. Full grown Aiel warriors have plenty of pratice at their trade. Southern wetlander nations do fight sometimes, but the standard soldier has far less fighting expierence than an aiel warrior. Even so the wetlanders have many advantages over the aiel. Wetlanders often fight from horseback, horses when used correctly (unlike how some of the retarded Cairhenin and Tairen lords fight...) give huge advantage over the aiel . You could say the Aiel fight with spears, but Aiel spears are short unlike their wetlander counterparts. Wetlanders have use of crossbows, which definately show unarmored aiel no mercy. To add to that Aiel disdain all armor except a small buckler it mentions that most wetland men in the books wear some sort of armor. Also proven by Mat, fighting the Aiel in an open field instead of a siege situation gives chance to pikemen to show their colors. The aiel have a hard time closing with the pikemen which makes them resort to using shortbows instead of their skill fighting with the spear.

Sorry this is a long post just it bothers me to see aiel have a godly like credit, they may have better morale and stamina than other troops but as far as skill valour comes they are easily matched by borderland nations and even a well led southron army could defeat the aiel.

PS. Great to see the unit list that I wrote what seems like years ago still in effect for this mod! Well with few changes but still my small contribution to the mod.