I'm glad I didn't know about not mixing cabs. Done it all my life. Well, all my bass life any way. 
 
	The sound when I use a TE cab loaded with an Epifani 10" paired with a TCE 2X8 is orgasmic. 
 
	Similarly 12" BF with a 15" BF.
 
	15" Bugera in a TE box paired with a TE 2X10 also sounds amazing. 
 
	Suck it and see is always my advice. What you hear, what you like is the only thing that matters. Remember unless there's a bassist in the audience no one but you really cares.