Okay, used the example of $scon I found, and now I'm able to broadcast on all channels at the same time!

Code
/*
** Global amsg - performs an amsg on all the
** the actives connections you are on.
**
** /gamsg <message>
*/
alias gamsg {
  if (!$1) {
    echo -gtcse info * /gamsg: insufficient parameters
    halt
  }
  ; all active connections
  scon -at1 amsg $unsafe($1-)
}

on *:TEXT:!botrestart:#: {
  .gamsg Please Note, the bot is required to be restarted due to updates. During this time the bot will be unresponsive. Thank you for your understanding.
}

Twitch Live-Streamer:
Synth Riders
Beat Saber
www.twitch.tv/eggfriedcheese