Guardian skills

So I’ve been a rook for a good while and I’m now max level I asked a 3 mil rook how to become a steel wall (I’m tryna become the best wall). I was told to get and go for fear with Heal Up as it’s skill there are only like 5 sets of fairly low cost armor and weapons, I’m tryna figure out what are some more good skills to have on gear. Also harmony being on a lot of this event gear is ass (plz don’t shit on the current build it’s auto assigned)

Any PVP/ PVE info for rook helps