You can try MobaXterm.
Log into all devices concurrently and then use Multi-Exec. Every character you type will be sent to all Sessions.
Or create a .rsc script which contains all the changes and then upload it to all devices by FTP and name it <yourscript>.auto.rsc - it'll thenm be executed automagically after upload.
MTCNA, MTCUME, MTCWE
There are 10 types of people: Those who understand binary and those who don't.
There are two types of people: Those who can extrapolate from incomplete data