ISO Tips for Corporate Headshot Process

Hi all - looking for tips on best workflow/process for managing a high-volume day of corporate headshots. I haven't done a day quite this busy before so curious how you have managed things like filing and delivery for over 40 headshot clients.

Questions I have:

• Do you deliver one gallery with everyone's photos or gallery per client?
• Do you typically tether to allow clients to see their shots as they come in? I think this is my preference but open to thoughts against this
• Is it too ambitious to try standing and sitting poses in a 15 min slot?

Any other tips will be much appreciated!