Void walkers need a buff to fight the Hammer of Sol.
So I though of a way to fix it. Void walkers now get 55% damage resistance. It appears like a radiant skin and they can throw 6 novabombs within the time limit. Every novabomb kill regenerates health and every novabomb is the size of void. If you have on shatter you can throw up to 18 novabombs. Obsidian mind also changes to that every nova bomb kill extends its duration. Allowing infinite nova bombs.