Hi Creator, you would just need to connect the local stereo output of ME-1 to the inputs of your IEM transmitter.
This way the user can have ME-1 flexibility and wireless freedom in their monitoring. This solution is used by Philip Selway on tour: https://www.allen-heath.com/radioheads-philip-selway-uses-allen-heaths-ilive-coachella-set/
“On this leg of the tour we are using an iLive-T112 surface, an iDR-48 and a ME-U with five ME-1 personal mixers. They are all using in-ear monitoring, which is fed from their individual ME-1s.”
You can either power each ME-1 with the DC PSU, and daisy-chain the units over CAT5 (there is no limit to the number of units that can be chained), you could use ME-U hub or a thrid-party PoE switch.
There are some recommendations for the type of switch in this knowledge base article: https://allen-heath.helpserve.com/Knowledgebase/Article/View/702/175/me-1-compatibility-with-a-third-party-switch
As long as you are using good quality shielded audio and CAT5 cables, running a stereo analogue cable alongside your CAT5 to each ME-1 unit will be perfectly fine.
Hope this helps!