It is actually possible in the Nexus client to see %hp on a mob by using tab targeting. Probably works for other forms of in-client targeting for Nexus but I never used those. (View Post)
Do a search for a trigger called "Unranked" and add the following as a regex pattern ^(He|She) has cut (his|her) thread from the Tapestry of the Fates.$ (View Post)