I think that we should change the ranks... In my opinion it should be:
"Black Rose Guardian"--Weakest
"Stardust Guardian"
"Red Dragon Archfiend Guardian"
"Signer or Dark Signer" --Strongest
"Black Rose Guardian"--Weakest
"Stardust Guardian"
"Red Dragon Archfiend Guardian"
"Signer or Dark Signer" --Strongest