I don't think you can have an alias using quote.
So, you have to get rid of the quote.
You could set the ip with the command
set REMOTE_IP "172.16.2.2"
save_profile
Then you could simply have an alias
alias superuser synchronize "script play commit_redundancy"
If you really need the options -d and -s, you could extract the commit_redundancy file [it's a text file] and in the function Check_Arguments replace the IF statement in order to always set -f and -d by default.
Then copy the script back to the CSS via ftp.
Gilles.