Re: Which era
			 
             
			
		
		
		
		Don't Celestial Masters come with a chance for a Nature random?  So at least some part of you CM crew will not have old age problems. 
 
I'd also throw a few chariots in the mix as well at least in the early game, at least as a flanking force vs. some of the weaker indies.  C'tis chariots are better and almost as good (if not in some ways better) than heavy cavarly, as they get a length-3 bite attack, but Tien Chi chariots have better morale. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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