Hi Andy,
I'm not aware that you can send art-net to Mistrips, we used barco d320 digitisers to do the mapping on Dior, though you may wish to use several mixes to optimise the number of digitisers required, and simply output dvi
or you can use exact maps if you want to map each strip in catalyst... (but would suggest you let the video techs do their homework
Cheers
Andy D