you guys need to define 1 thing: toughest hole to birdie or par? that makes huge difference, IMO
here is the breakdown:
hardesto to birdie on bp in order of difficulty, IMO
#15 #5, #9, #7, #12, #10, #17 - last 4 holes easily play stroke difference in right wind
to par# #15, #5, #7 rest aren't too touch
kiw:
birdie: #9, #4, #18, #10, #17 with last 3 can be changed due to conditions