irule priority with asm - version 9.2.4

SOL7041 has an example of how to handle scenarios in iRules where you want to prevent the request from going to ASM.

https://tech.f5.com/home/solutions/sol7041.html

Click here

when HTTP_REQUEST {
  set asm_bypass 0
  if { [HTTP::uri] starts_with "/mydir" } {
    HTTP::redirect "http://www.mysite.com/myredirect"
    set asm_bypass 1
  }
}

You could also tweak your rule slightly, as a URI will never be 0 length. If it's 1 character, it must be "/".

when HTTP_REQUEST {
    by default, don't bypass ASM
   set asm_bypass 0
   if { [HTTP::uri] eq "/" } {
       request was for / so send a redirect and disable ASM for this request
      HTTP::redirect "http://www.domain.com/home"
      set asm_bypass 1
   }
}

Aaron