with the tex-mix you can use the 2 mono sends as a stereo send to a single stereo effect (or effect chain) which is how it's set up on the stereo channels - this allows for a further stereo channel input to the mixer on the spare return - although you only get a volume control and not panning or mutes - nor access to the direct outs if you are using those

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities