There´s a build here in Forum -> [Wettbewerb Für Leitfäden] Behüter PvP Heiler Build by Pegasus
But I don´t play Warden FH so I´m not really sure if it´s really good or not.
Maybe someone else who is currently playing Warden FH will answer or you also could ask in the Discord maybe someone there has a build for you!