Since you've got the patience to think about improvements over the long term, IMO you don't need too much structure in your training, just more miles, and steady progression. So 4 runs is better than 3, a 10 mile long run is better than a 6 mile long run (but build gradually), etc. Keep things interesting with a parkrun every other week, which is often enough to chart progress. Aerobic x-training like cycling and swimming will certainly complement the running but won't help you improve quite as quickly.
Berlin marathon is less than 7 weeks away and I've managed to run 97 miles in a week without breaking anything. Encouraging!
Since you've got the patience to think about improvements over the long term, IMO you don't need too much structure in your training, just more miles, and steady progression. So 4 runs is better than 3, a 10 mile long run is better than a 6 mile long run (but build gradually), etc. Keep things interesting with a parkrun every other week, which is often enough to chart progress. Aerobic x-training like cycling and swimming will certainly complement the running but won't help you improve quite as quickly.
Berlin marathon is less than 7 weeks away and I've managed to run 97 miles in a week without breaking anything. Encouraging!