Optimize this applescript?

Question

Hi all,
I'm trying to build an applescript which is running everyday and all the time on my computer like 24h forever.
That's the reason why I would love to have it as simple, and as efficient as possible. Without having me to manually quit or restart it if anything happens.
It will essentially check for application to be active, if not depending on the folder it sees, it reopens those application.
If it does detect another folder it scans the media to see if a blank CD is insert, if so launches the main APP (APP0)
So, right now it is working properly, just asking you guys if you see a way to make it better, and more reliable. Thanks a lot!
repeat while 1 = 1
  delay 5
          repeat while application "APP0" is not running and application "APP1" is not running and application "APP2" is not running and application "APP3" is not running
  delay 2
                    tell application "Finder"
                              if exists folder "mypath:v" then
                                        if exists folder "mypath:v:1" then
                                                  try
                                                            tell application "APP1" to activate
                                                  end try
                                        else if exists folder "mypath:v:2" then
                                                  try
                                                            tell application "APP2" to activate
                                                  end try
                                        else if exists folder "mypath:v:3" then
                                                  try
                                                            tell application "APP3" to activate
                                                  end try
                                        end if
                              else if exists folder "mypath:m" then
                                        try
                                                  tell application "APP0" to activate
                                        end try
  -- CD INSERITO
                              else if exists folder "mypath:o" then
                                        set r to do shell script "/usr/bin/drutil status"
                                        delay 10
  -- SUPPORTI NON ADATTI
                                        if r contains "DVD-ROM" or r contains "DVD+R" or r contains "DVD-R" or r contains "CD+R" then
                                                  try
                                                            do shell script "drutil eject"
                                                  end try
  -- CD-R OK
                                        else if r contains "CD-R" then
                                                  if r contains "blank" then
                                                            tell application "APP0" to activate
                                                  else if r does not contain "blank" then
                                                            try
                                                                      do shell script "drutil eject"
                                                            end try
                                                  end if
                                        end if
                              end if
                    end tell
          end repeat
end repeat

Answer 1

This looks a bit like gibberish but what I would suggest is a function ZZZ that takes three parameters (A, B, C.COD), evaluates them using YYY and XXX and returns a trivalent result that you can use in the WHERE clause.
An even smarter solution might be to have the ZZZ return a user-defined nested table type of A, B that can be used in a TABLE() function in the FROM clause.
Cheers, APC