ZDH role in high GRS

hi there

What are the primary obligations of a ZDH in s22 high GR pushes? Based on what i have seen on youtube, it looks like a mix between scouting and getting back for the poison cycle to debuff mobs and cast sentry. Is that it? Are there any nuanced pointers I should be aware of before trying high GRs?

Pretty detailed guide available here…

The Gameplay section details responsibilities.