In reply to rich432:
Go full size.
If your recorded climbs are true, you'll get much more benefit by having a good dump before climbing, weight wise (obviously in an environmentally responsible way ).
This is the equivalent of a gear obsessed MAMIL cycling thread.
The major benefit would be psychological rather than physiological.
(Talking as one who has lost > 1 stone in lockdown, due to changed working/ leisure practices, and whose cycling efficiency has improved significantly)
Hope you're happy whichever gear option you take.