Listen. Different times of the year call for different types of training. When you’re in competition phase and doing workouts and races you need to have recovery days. But prior to that phase you need a high aerobic phase that many runners are hesitant to do but actually is super effective if you’re diligent about taking care of your body with stretching, strengthening and rest.
The aerobic phase can be 4-8 weeks, and during this phase at least every other day you should work the aerobic system with runs at around 6:45-7:00 for a runner like yourself. Without workouts theirs not need to recover. Every other day gives you a lil break but also you can get in 3-4 of these aerobic runs, and even let your long run go at this faster pace. The first week will be rough so keep the distance of these runs short say 20-35 min. Don’t do the long run this pace the first week wait til second week. After a few weeks you’ll find your groove and almost feel like running this pace for every run but refrain from doing so. You’ll find how strong you’re becoming . After this phase is over you can keep 1-2 of your weekly runs like this but do them on days before workout days. All of your other paces will become faster(5k/10k(critical velocity) or even threshold will improved greatly. Most athletes I’ve had do this will immediately get a 20-40 second drop in their 5k. Just stay healthy and take care of yourself, good luck
Interesting you’re suggesting he do (just a bit slower than) a tempo run every other day?