GLD is just balls at tanking in lower level dungeons anyways. It requires a lot more effort to be effective than MRD.

MRD? Your rotation until 30+ when you go WAR and lose invigorate is basically overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower > overpower.