I'm following a half-marathon training program, with 25% longer long runs, from Run Club McMillan for a 30K cross-country race on September 24. I've added all the workouts to Fit Plan, with some adjustments for two tune-up races on August 9 (seeding race for the A race) and August 28.
The attached is the training load forecast up to race day. As you can see, TSB is as low as -6 on race day, despite even having lowered the expected TRIMPs for the last week workouts of the tapering. And the seeding race has -3.7 TSB as well.

- Training-Load-2016-07-29-edited.png (220.46 KiB) Viewed 5952 times
What can I do to raise the TSB, particularly for the September 24 race, without compromising the CTL too much?
By the way, I've had a 2-week break from running up to two days ago, due to calf strain, and did indoor cycling and roller ski instead. That's why TSB went from -22.5 after the long run where I felt the strain, up to -5 some days ago.
Sure, I could shorten the long runs, or run even slower, to lessen the TRIMP (particularly 22 Aug, 3 Sep and 10 Sep), but then I also wouldn't get the mileage I might need for the 30K race. Or should I taper even more aggressively?