You are correct. It NEVER heals anymore. I like people like the poster above you that says it still heals. Why do people post when they are easily proven wrong?
well they may have fixed it : https://forums.daybreakgames.com/eq2/index.php?threads/update-notes-friday-january-3-2020.592558/
I apologize for being wrong about tap veins, Xloitl lied to me and said it was only healing off one mob. I don't play silly crusaders.