Better tools, more journeymen, more books, a better learning Stat and an even better lab Also I don't think we've finished the Liber mortis.
More journeymen wouldn't help with the initial investigation (which needs to be secret anyway, as messing with daemon blood in public seems another rather foolish aspect of the prevailing plan), and I don't think we even know what better tools would look like.
I've not seen anyone propose waiting until we get a better Learning stat.