I found Scott’s replies in this thread from a few years back really helpful.
The upshot is that strength training is not well tracked by time. Naturally, you could spend the same length of time in the gym two weeks running but lift twice as heavy the second time as you did the first. Tracked by time, these workouts are the same, but in reality they’re totally different in terms of load.
What I’ve settled on, based on what I’ve read here, is taking the hourly volume as just aerobic. Any additional strength or climbing sessions, or stuff like stretching/foam rolling to be completed that week is on top of the weekly aerobic volume. If you do the same, you’d start off with 2.5 hours of aerobic volume plus whatever other workouts you have to fit in. Adjust from there. And be consistent in the way that you track your volume throughout the programme.
Hope that helps.