There should be a lvl 56 set to where when you turn lvl 56 u get the helm of perseverence and then u can purchase a lvl 56 set for either plat or gold. When this happens the lvl 56 charaters become stronger and more durable to attacks so when the lvl 56 set comes out (if it even happens) then the lvl 56 will truly be the strongest players on PL.