I used to use mine with some volcas and I just used twin mono jack connections. You can plug the CMS to the socket under the mic using an instrument level mono jack, and then the M:S into one of the stereo pairs using a twin mono jack. If you had 3 of CMS you would plug 3 instrument level mono jacks into the lower sockets,
There is a slightly better quality mixer, the VLZ4 402 which would also suit your needs but it has 2 mono inputs and 1 stereo as opposed to 1 mono and 2 stereo. Have a look and see what you think. The main differences are a built in power supply and dust resistant pots.
One thing to note is that connecting a bunch of stuff, all running on power supplies can introduce some hum. You can minimise this by connecting everything to the same power bank. Just something to keep in mind