Reply to Routing two digital mixers

Hi

Has anyone had any Experience routing two digital mixers together, I'm playing out on Friday in a club and my friend is insisting that we use a djm800 I have an ecler evo5 that I would like to use so I can mix on my mf,s, would using one of the line ins be.a problem, or so long as I keep the master out on th ecler low?