Flexi season tickets are not an option within London because daily caps are already 1/5 of the weekly cap/travelcard. The daily cap for zones 1-6 is £14.10 and will be reached if two peak time journeys are made. It doesn’t really matter which route you take. One option you may not have considered is Kingston – Wimbledon – Farringdon – Barbican/Moorgate. This may be slower on the travel time, but cuts out long walks between trains at Waterloo and wherever else you change on the Underground. Both Wimbledon and Farringdon are simply crossing a footbridge, and on the way home it’s adjacent platforms at Farringdon.
Thanks Mike! So I guess it wouldn’t make sense to buy any of the travelcards because of the daily cap within zones1-6?
Another route I considered is getting off at vauxhall and then changing to stockwell then moorgate, which might involve less walking, but it still takes an hour, just curious if there’s any shorter travel times?