Your norms and your diffs have the same cylinder correction, so whichever you wear, you will get some hyperopic defocus on your strong meridian with close work. But with your diffs you will get less hyperopic defocus on your strong meridian.
As you have found out yourself, keeping high cylinder correction in diffs, and not tackling cylinder reduction early in your low myopia/high astigmatism situation, were not good ideas.
As you cannot get new diffs, you could wear your norms and push your screen as far as possible for close work, so as not to get your eyes adapted to a different sphere to cylinder ratio in your diffs. How much it would harm your eyes to do close work with your diffs would also depend on how much close work you do. Taking regular breaks for distance vision is essential in either case.
The good news is that you have a reduction in sphere in both eyes, and in cylinder as well in your right eye. This also goes to show how unreliable ‘professional’ measurements can be - who is it that overprescribed you?
One of the things you need to learn to do is accurately measure your eyes yourself. This is difficult with astigmatism, but can be learned. For your left eye, for example you should see the first sign of ghosting/double vision at 24 cm (-4.25D) and the main image should start overall blur at 50cm (-2D). For your right eye it would be 45cm for astigmatic ghosting and 58 cm for overall blur. That is, if your ophthalmo got the measurements right, which is not always guaranteed. You should do this for several subsequent days, and take the average. I do this on printed text in good natural light, as my distance to blur on screen in artificial light is not as good.
I am not in the high astigmatism low myopia situation, and you might get some better feedback from those who are.