I’d now be sticking in Hill Climb intervals into your plan.
I’ve done and do structured training throughout the year, whilst you always see improvements on the flat and general heath/speed that unless you do specific training on target issues you’ll remain the same level, rather just continue getting fitter.
You need to find a steep hill of at least your 7%, needs to be at least 1k long and repeatable. Start off easy spinning, take your time and get a baseline for the climb. Then turnaround and repeat, and again until you have 5 in your bag then assess the overall baseline for that session.
Then, then build intervals out of those results, at certain parts of the climb sprint for 10sec’s then back to your base cadence, and repeat and so on both extending time in interval and pace.
Spinning is your friend when in this particular interval segment, but also do this standing up. So again, do the climb standing, get a baseline of 5 reps and then add intervals.
It’ll make you want to vom at the top but hey, it needs to be done.
If you don’t have any climbs like this near you you’ll either have to travel, or mock up something on what you have but try to replicate the effort.
HTH’s