You're gonna get mixed answers on this, Archaon costs 855pts and yes there are cheaper Lord choices...what it comes down to I think is the player's personal preference, I mean for smaller armys Crom is probably the best choice, if you're playing a bigger army Archaon might be a good choice. My preference, I use Archaon, in the hands of a good general he can be devastating (not saying I'm good lol) i.e. I've taken down regiments of 16 with just him alone. *shrug*