You don't have to have bone nova in your bar but i didn't find any skill for slot. It has to be skill that doesn't affect your attack speed and you have to cast bone armor and curse frequently already so i left it "empty".
Damage was descent even proc rate is smaller than iron rose but Bone spike - bone pillars attacks 3 times. You could use focus&restraint (bone armor procs it) but then your toughness is awful because you cannot use aquila cuirass in cube since Bryner's Journey is body piece. One solution is Ancient Parthan Defenders but you still class cannon. Also you have to self cast blood nova every 5 sec to proc restraint.
For solo build you can switch RoRG to unity and drop aquila cuirass.
If you want you can use curse aura but then you lose one change to proc Krysbin's Sentence. Then you can only proc it with Bone armor but you chance Eternal Torment to Spreading Malediction
RORG is free during S16 so you can use SOJ or focus&restraint.
Blood rush to enemies, bone armor, curse, bone spikes and repeat. Spam bone spike inside your bone armor area.
This is a more like fun build I doubt that it is effective in higher GR.
Check paragon for gear stat priorities.