What are you looking for from a total design. the Columns are utilized to link the parts together and within the various sets are more then a few combinations including angled ones.
Since this particular wall is already angled you can even just connect straight to various other walls and forgo the need to connect a column or buttress.
Something like a chain of the following;
P-TRP-BrickWal & D-TRP-BrickWal & P-TRP-BrickWal & D-TRP-BrickWal
This should be something like \_/