Maybe but they can be resurrected plus they have better skills, they can easy obtain +3 morale, send them in the middle, they are great tank with unlimited retaliate.
Btw. Too much defense or offense can be overkill (ogre is best example) because of caps what makes warriors life not so happy.

Remember - Attack / Defence is not the most important pivot in whole KB combat system, so don't pay too much attention to these.

KB has very clear calculation of leadership / unit stats - this you can use to your benefit greatly - as this calculation gives the nearly same respect towards att/ def / dmg and less towards skills - where it are the skill that make the difference (that's why not few people believe that dryads are overpowered - for it's skills)

So if you are really tactical and perfectionist - and you know the game well - you may create your own comparission table -> where you would align your own (based on your tactics needs) "mark" - "value" to each unit stat (speed/ init, att, def, dmg, resist. ...) and compare with the unit's leadership - so I realized that I don't want black or red dragons - as their leadership is too high compared towards their attributes in my own table - but I rated vampires or griffins much higher as these units plea my tactics need for evil or good army (guess which is which)

Basicaly archdemons should be able to take more damage and deliver more damage with the same leadership than demons - but the difference is let say 10~20% , but with demon combination of skills you can increase your total army effectiveness by 100% and more -> is the 20% more damage from archdemons (one stack- one fifth of your army) still so important?

That is why many players chosen not to use bone dragons as their att/def/dmg is much lower than the one of other dragons - still their poison round attack is a MUST for my tactics (not to say that only few units have real poison resistance, even black dragons have 0% poison resistance)... and bone dragons have much more lower leadership

I found archdemons to be extremely effective against red&black dragons, but apart from that they are not all that great. Against dragons: 80% fire resist, high attack&defense, Rahha's shield (+50% defense against dragon attacks - looking at the stats, I think it just lowers enemy dragons' attack by 50%), Dragon Slayer sword (only 1, because of Feanora)... rather unfair ;)
So I had a stack of archdemons in reserve later in the game, as you oppose quite a lot of dragons... but generally (I played as a mage), I preferred emerald green dragons as my fast attacker by far. With time back at the end of the 2nd turn, thats up to ~80 extra mana, depending on positioning (could be less or even more).

They are random as almost any other unit. I found them when just running and exploring the demon realm. Got even to the Baal's castle and he teleported me to the center of the realm.

BTW (kind of spoilerish)...







In one of the quests you can choose which kind of troops you will be fighting against in another quest later.
A demon "recruiter" asks for an advice - which kind of mercenaries to choose for battles in the iceland. Guess who you will be fighting later:-)

The randomness of this game is kinda sick, it may happen that u don't find a troop at all, while sometimes u find it just everywhere. But i think it also make the game funnier to play, cause you have to play with what u got, so every game is different. I just wished that, if any item of any set was spawned, the entire set was spawned; Kinda frustrating that i had never completed the knight' set in any of my games...
btw, about the archdemon/demon ... i think it's a question of use/type-of-battle more that troop itself. IMO demons are just stronger, with more efficient dmg output, and better overall abilities, and for normal encounters they are just too good; but against a hero, especially one with dragons, i will use archdemons, cause they can tank so good with high def/att stats and resistances, and most of all, cause being a level 5 unit they are almost untargettable by spells, and also they will just get rid of any effect in one turn. i HATE too see my hundred fiery daemons become little defenseless sheep! it doesn't hurt to use them both anyway :)

Wait, I was wondering about what the point was there...So where exactly do you get to fight the kind of units you chose?

After you return back to the Dwaren King Castle - it will be under siege and you will fight exactly the type of units you choosen in Demonis in this "quest" - I mostly select humans... but it is just question of strategy taste

Oh... thats why i fought lots of cyclops XD. Damn i choose best units for what he ask.

About bad luck i have impossible mage lvl 17 with 41 int but it will be more, over 50 for sure (i still do not have daemon wife with double weapon) but i cannot find Armageddon anywhere, my last chance is exchange world map for spells but i missed one obelix do not know where and now i am pissed.

You should exchange the worldmap for runes, everything else is a waste. And why would you need armageddon anyway? It's highly overrated.

Exchange world map?

Can someone remind me what this is about?