>>527518578
This setup makes Guardian very strong. The first and third relics are from his remembrance, the second relic I just found randomly.

Damage reflect + increased duration lets you hold aggro extremely easily, the art hp heal is insane, just hold RT+Y after you land and Birdo will heal up you and your party if they're not miles away from you, it's a significant heal too.
Second relic helps generate a lot of stance damage whenever you lose aggro.