rocklikeafool
Warmaster
Well, there are a few modmods that increase the use of CoE, albeit only in the aspect of units. Try out Tarqueline's modmod that adds in 2 Calabim UUs, the Bloodseeker (a non-CoE assassin unit) and the Angel of the Eclipse (a CoE Shadow UU). So, it all depends on your gameplay style imho, whether you like CoE or not. I'm generally a warmonger, so I generally choose OO for the Drowns and Stygian Guards. But sometimes I mix it up with some stealth and CoE. It's all up to you, man.