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I have finally managed to fully magnetise the ShengShou Pentahedron including the top and bottom layers. For the slices, I used 5*2 magnets in the corners, stacking a 5*1 magnet, a 4*1 magnet, a 3*1 magnet and a 2*1 magnet on top. For the edges, I used 5*2 magnets and stacked 3 5*1.5 magnets, a 4*2 magnet, a 3*2 magnet and a 2*2 magnet on top. For the U and D layers, I found that it is possible to magnetise the top and bottom layers by magnetising the centres and edges. I used 5*2 magnets in the centres, stacking a 5*2 magnet and 2 5*1.5 magnets on top. For the edges, I used 5*2 magnets stacking 5 5*2 magnets and a 5*1 magnet on top.
However, after I have assembled it, I found that even though the magnet in the slices are noticeable, they are way too weak compared to the U and D layers. Like in a square-1, it is preferable to have slices stronger than the U and D layers. However, there seems to be no room to add any magnets on top of the magnets installed. Hence, I tried to add magnets to the slices in another way.
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I realised that I haven’t removed the white and yellow caps before as I thought it is impossible to do so. However, it is actually possible but with great force, especially the edge caps. Once I looked into the mechanism of the top and bottom layers, I realised that it is actually possible to increase the magnet strength of the slices. I used 3 5*1.5 magnets in the edges and a 3*1.5 magnet in the corners, stacking 2 5*2 magnets on top of the magnet in the corners as shown in the photo above. This made the slices ridiculously strong to a point that the magnets actually hinder the turning. Then, I changed the additional magnets in the corners from 2 5*2 magnets to a 5*2 magnet and a 5*1.5 magnet. This made the turning a lot more reasonable with the slices just slightly stronger than the slices of a mgc square-1. It is now fully magnetised and it has strong slices accompanied by medium-to-strong U and D layers.
This is so complicated that I actually used 10 types of different magnets. Also, I am glad that I managed to magnetise it to a reasonable magnet strength without removing any plastic.