TP, I think I have played enough games as Archons to understand the usefulness of each of their units.
Avengers are specialists - specialists against evil. Their ranged attack, while useful, is very effective only behind walls. With their low def, they are almost evens with the Crusader when it comes to melee fighting - where the Crusaders block and higher def helps.
Your Avenger had - Holy strike, Holy immunity, Holy champion, Round attack, Turn undead.
Crusader has - Holy strike, Holy immunity, Holy champion, Throw Spear, Block.
Why should I build the Avenger when the Crusader is far better for the investment?
Death Knights may be formidable without fire immunity but I still think they need it to become truly fearsome and be the Undead's answer to the Holy Archons. Besides, thematically, I think Death Knights should have all elemental immunities - fire, cold, lightning, poison and of course, death.
You are missing the points about the Titan. Best stats, good hp and holy strike (hard to counter) and the cost was only a little more than the other lvl4s - which on even terms, makes the Titan far more powerful...a slight increase in cost (to the cost in 4.5) would be better to even that out. A martyred Titan killed 2 gargoyles, a martyred lightning warrior and a couple of other units in a game I played. If that is not powerful, I don't know what is!
...and don't quote statements out of context! When I said you can mass lvl4s, it was a statement made in the context of adaptability to a new mod by standard-rules players! Whether they are effective or not, to quote Air - if the player wins, they are effective indeed.
Trying to set up a scientific experiment will not work for a game...how will you set up tests without magic? Every major battle has loads of magic in it, atleast 60-80 cp worth. Conducting tests including magic is extremely difficult as sphere assignments and skill choices cannot be made. Only through playing a game/mod for long can you gain an idea of the advantages/imbalances/etc.
As for the shadow, I still think you need to remove trail of darkness. There is no point in having invisibility and trail of darkness since they negate each other! The scenarios outlined by you, TP, are not appropriate. Why would a player not move a shadow if it is in unexplored area of another player? How do you know that area is unexplored by another player? You cannot sneak in behind another's trail....this is not an ability that toggles on and off. If you have to sneak in, you have to move, which means you leave a trail. 
As for domain of darkness, you don't need the shadow then. Even if you move the shadow within an enemy's vision range inside your domain of darkness, the trail will still give him away!!!Edit: Air, I still don't have a connection. I will be travelling in another couple of weeks time so don't think I will take it now...but I will be online after 2 weeks. 
2009 1v1-Mapmaking Champion,
Former PBEM Singles Champion,
Proud contributor to the UPatch 1.4 and 1.5 effortWar of the Twins- 1 vs 1 PBEM map,
Too Much Water - 1 vs 1 PBEM map, winner of 2009 1vs1 Mapmaking Challenge
My Dragon Age development
blog[This message has been edited by Timelord (edited 04-04-2006 @ 07:18 AM).]