Being a nosy bubble burster, :P can't we do it using /scon -at1?

alias looper { 
  if $isid {
    var %chans 1
    while $chan(%chans) { 
      scon -at1 $1 $v1 $$2
      inc %chans 
    }  
  }
}

no. you're looping through channels on the current connection and performing /scon -at1 for each one, which is backwards.