I feel like you want to hear that this is not fair, and there is some way out of it. But you have patients, and you are responsible for them.
Ways to easily get this done
1) By the sounds of this, you are writing reports by test rather than domain. Go back, find an old dementia report that you did well on. Copy each test section. I'm guessing that you write something like, "on a subtest of crystalized verbal knowledge, the patient scored in the average range". Great. Find where you wrote "average range". Replace that with some low frequency phrase like "blacksheepwool", so that your new sentence reads "on a subtest of crystalized verbal knowledge, the patient scored in the "blacksheepwool" range " Repeat this for each subtest, and each test. Now you have a template for dementia patients.
2) Take that template. Create copies for each patient. Next, take your first test. Let's say it's the WAIS. Go subtest by subtest, replace "blacksheepwool" in the template with whatever descriptor is appropriate. Do the WAIS for the next patient, then the next. Now you've done all of the WAIS sections. Now do that with the next test. Don't even pay attention to what you are writing. You're just operating as a replacement machine. Now you've banged out all of the tests. That's the majority of the work right there.
3) For epilepsy, do the same. You know they're gonna want you to say some extra stuff about handedness, language, port wine birthmarks, gait, maybe fencing, maybe religiosity, etc.
4) Next write your intro for each. You should have this relatively standardized. "Patient is a age, handed, gender, with years of education who .........". Again, each component is pretty standardized.
5) Only you only need the summaries. Eight summaries? Not hard. First paragraph, you copy the intro, then rephrase a few of the sentences. Next paragraph then say something about the overall scores, and pattern of performance. Next paragraph you correlate with whatever diagnosis. It's likely that at least two are going to be DAT.
You could have that done by tomorrow. They're not going to be strong reports, but they will do.