Hi !
Well, you cannot directly. Yes, you can after export + load innodb tables into IEE.
As I mentioned, queries involving tables other than defined as engine=brighthouse are slow, or very slow. They are executed by mysql optimizer. I am not sure if you really want to have tables from different engines in one query - unless you have small tables or the performance is not an issue.
And 3) “Insert into ... select…” is to be replaced by export + load with the two servers solution.