I once saw I really good way to make those small pyramid shapes on the New Yankee Workshop. Norm had a strip of wood the same height as the blocks. Let's say the blocks were 70mm x 70mm. He had a strip of wood about 1m long 70mm high x 20mm thick. He cut all the blocks square, 70 x 70 then put a screw in at the end on the long strip exactly into the centre of the underside of the block.
The table saw blade was set to the desired angle then the long strip with the block attached was pushed through the blade. Pull it back, rotate the block 90deg & push through again. Repeat until all 4 sides are cut.
Really quick & safe.
Did that make any sense ?