I did a vEveresting in the summer on the AdZ. Assume you’ve got a direct drive turbo (as the hall of fame rules require this)? My lowest gear was 36-28, which is a bit of a grind on the steeper sections – so a bigger cassette would be wise if you prefer to spin.
The Alpe is the most efficient way to do it – and the sectors help break it up (not sure I’d fancy Ventoux for this).
Pace-wise, it’s tempo all the way. Somewhere just below sweet spot if you want to do it as quickly as possible or slightly easier if you want to make it more pleasant (I aimed around 85% of FTP I think, which was slightly ambitious but I just about pulled it off on average, with a minor crisis around the 5th ascent). Having people join you is a welcome distraction too (Garry Lager did the honours for me at my worst point).
One of the less obvious things is that you should u-turn straight after the finish line/start line. If you want to eliminate the Race-to-the-Sky lead in in from your time then use the “ride with” option and join someone who has already ridden the lead-in (I didn’t know about this, but read that the guy who just set the record logged in on his wife’s account for the lead-in so that his time didn’t include it).
I was told it was quicker to switch to a TT bike for the descent, but it’s pretty marginal so I got bored of doing that half-way through.