If you were using an entirely digital system, then intermodulation would not be a problem - although there are still minimum spacing requirements between each frequency.
If you go by the book, then with a mixed system of analogue and digital mics, you should prepare a full co-ordination, as if they were all analogue.
If your Zaxcoms can tune to the Lectro co-ordination, then use the frequencies you have prepared. If they don't, then don't stress, just tune the analogue and digital units as far apart from each other as you can, and you should be fine.