Are you familiar with Doreen Speckman's Peaky and Spike?
It looks to me like it's a nine-patch - built from five four-patch units and four Peaky and Spike units. But the author isn't using the same angles that Peaky and Spike used.
The four-patch units could be strip pieced.
I'm having a serious problem with the dimensions given for the pieces.
The author states that this is a 14 inch block
The four squares will finish into a 4.75 inch unit. (5.25 inches "unfinished")
Are you able to redraft this into either a 12 or 15 inch block. It would make drafting and cutting considerably easier.
And I don't think there is an "easy" way to construct the triangle units.