TLDR: Remove the annoying stack mecanics, boost a little bit the self healing, and make a two-handed variation of the build. But pls read the rest.
First: the 3 stack mechanic and here I’m just talking quality of life. Why is there a stack mechanic. All that does is when you are out of combat, you cast holy shock on yourself every 15-20 sec to keep your stacks. Its just annoying. Its is the most annoying where you can mount, cause you need to dismount, cast holy shock and remount. 2 solutions: 1- remove the 3 stack mechanics. 2- make that casting judgement give you the effects of the 3 stacks.
Second: The self heal. The biggest weakness of this build is the self healing, and you know what, that is fair. A build that can do some dps and heal as much must have a weakness, especially in PVP. But this weakness is so intense it goes against the thematic of the build: a melee healer. Cause you cannot keep yourself alive and you do almost as much heal from far away, you are incentivised to not play the melee part of this melee healer build. 3 solutions: 1- make that you can adorned yourself, but for half the amount of heal. 2- the heal procs form melee attack is negligible and doesn’t affect you, make it better and make it affect yourself way more.
And BTW, there is a lot of DPS healer now and they don't have this weakness. So three of wrath and cautorising fire are better at melee than COJ because they can heal themself and COJ can't.
Third: Variation. It is really personal, but I Like the fantasy of a single two-handed weapon, and I find Divine storm feels way better to cast than hammer of the righteous. 2 solutions: 1- make a purple RE that boost the two-handed variation, probably boosting the healing of divine storm even more by making it scale with healing power. 2-make a similar RE than pious strike that work with divine storm instead (that one would be hard to balance, but really cool).