I don't want to ask for backup. Since both of our options here are high profile people who are almost certainly under near constant surveillance, for them to be in any position to back us up, they'd arouse suspicion, and potentially increase security. Remember, our goal isn't to wreck Yan Renshu, it's to lift a particular set of objects and get the fuck out. Ideally, we just do a reconnaissance and figure out what we need to launch the op.
I also don't want to randomly hand out Argent Current either. We weren't the only one who was involved in getting it, and Xiulan probably gets a say in the matter too.
Additionally, I'd like to hold off on the Black Ichor Elixir for now, at least until we've had a chance to study the Journal. A Death Art could be a huge trump card if the journal contains one, as it's a Rare Element.