On a recent Roadman podcast, the first question was how Seiler would recommend using ~8 hours per week over 4 sessions
1 x long ride (3h+)
1 x 2hr
2 x 1hr hour high intensity
Fewer training days, but stretch one of them
The video is set to go right at the start of the answer - well worth the 1β40" it takes to have a look imo