powsloke...I'm getting some red flag vibes from your post. only been back running for year or two...running 100 mpw or more...wanting to do more speedwork...
basically it seems like you might be biting off a bit more than most people would recommend. 95 mpw seems like a lot already for somebody who never ran in college and took ten years off. what if you stuck around that mileage but just adjusted the workouts a bit?
anyway...so it doesn't seem like I just showed up to crush people's dreams...
I actually started the 2:30 thread a couple years ago before Boston '18 but ended up running 2:39 in the cold/wind/rain which wasn't horrible but not was I was hoping for. The only other serious marathon I've done was a 2:32 at CIM in 2016, which at the time was the best race of my life.
I was probably in 2:28-2:29 shape last spring while training for trail ultras (50k and 50mi). ran a 71min half early in the buildup then ran a 15:31 5k a week before my 50 miler. Right after the 50 miler I was going to train for a marathon but had a swollen foot for months from the ultra. Since then, I got back to probably 2:32 shape again last fall while training for a mix of XC and more ultras. then in November I developed a knee injury caused by overpronation that I'm still dealing with.
So right now, my longest run has been 7.2 miles (this morning) since before Thanksgiving and my usual runs are 4 miles, 5 days a week. Doing some PT at home most days for maybe 30min. I was originally going to try for a 2:29 this spring but now am pushing it back, maybe to Eugene in May if I can get back in shape by March.
Mileage has been nonexistent...260 miles for both September and October but then 154 miles in November and 34 miles in December. Ran 23 miles last week though and expecting to be low 30s this week. If things go well I'll add about ten miles per week until I hit 60 then I'll take it slower. Might try out a low mileage marathon plan, like 70-80 mpw but with either more quality or faster easy runs.