Can Elspeth grant a subagent other than the main one control of her body? If so, then she can become much more formidable thus: she has the memories of many, including of course many who are very good at combat, so create a 'Melee' subagent (in keeping with the tradition of names beginning with M) that is in charge of knowing vampire melee combat in and out, and when necessary grant it bodily control. In general, Elspeth+memories is a really powerful combination; with subagents she can process the knowledge in ways unavailable even to vampires, and do fun stuff with it.