The only way I can see of using the right inlet to achieve a multiple send involves [list-drip] and one [float] object, which isn't very efficient. It would also get more complicated if you wanted to send something other than floats--you'd have to use [any] which isn't Vanilla.
You can already send to multiple locations using the [; message( method, but you have to spell the message out every time.
Subject: Re: [PD] multiple [send] arguments
To: pd-list@lists.iem.at; liamg_uw@hotmail.com
From: colet.patrice@free.fr
Date: Sat, 5 Mar 2016 14:32:25 +0100
  
    
  
  
    no need for multiple send object when you set dynamically the send
    message
    
    
Le 05/03/2016 12:04, Liam Goodacre a
      écrit :
    
    
      
        
        If the [send] object could send to multiple
          locations at once (ie. [send one two three] ), it would save a
          lot of work with connections, as in the attached situation.
          Would other people like to see this happen?
        
       
      
      
      
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