Which is more powerful?

[Zechnophobe]

Using just archers only works on lower difficulties I find. Otherwise you end up just not being able to do enough damage against large foes. My current Hard warrior uses Black and Red Dragons, Inquisitors and Paladins, and Demonologists. Dragons tank very well, and do large amounts of area damage. Paladins and Demonologists are your tank units that you pit against 'omg' stacks, (Demonologists by summoning, paladins by being paladins) and inquisitors are my only real archer.

I have both max blood lust, and max voice of the dragon, so yes it is fairly far into the game. This combination of items/skills/troops has a lot of tactical options available to it.