Hey guys any advice/critique is welcome

My Armory

Got a couple questions;

Should I go for Unwavering legs or Sunguard (I only have 220 BV)

Is T4 Bplate comparable to the Bplate of Stoicism or should I get that

My current badge buy order is the bracers, the SSO Ring and then legs(I am uncertain of which ones would be best improvement)

My current aim is to be able to Tank ZA with the ability to OT t5/t6 content as needed by guild