Thank you Felix.
I implemented a gateway which is 99% of its time receiving values of sensors without Listenmode capability. Those sensors only report something Movement, Temperature, Humidity, Smoke, Aliens...
Other sensors/actor combinations will have Listenmode.
I could successfully wake up a Moteino with ListenMode_Node sketch from my Gateway. I'm broadcasting to 255 for wake up burst.
The only drawback I saw in the mainloop of the gateway, that once I send a wakeup burst, my radio could not receive messages from sensors anymore, which are not compiled with ListenMode lib.
Thats why I need to reinitialize the radio in the gateway after the burst message.
Would it be better to send individual bursts or broadcast bursts to sleeping listening nodes?
BTW I control the gateway with Node.red see screenshot. So I can design prototype some flows before implementing them in software.