I like your cleric run, it's hard soloing without abusing the stealth mechanic.
Did you consider Teahouse' well drinking to add to survivability?

Also, your character being a true fanatic of Vlaakith, do you think she is aware she is actually cheesing it by using Yeenoghu's-imbued weapon? Or you are roleplaying it is as a measure of self-deception, saying to herself it's Frodo/The Ring style?