Back when I was going for uber-IBU WCIPAs I did not use any post-boil hops, period.
I did a 60 minute addition for most of the IBUs, then 15 minute and 5 minute additions for "flavor and aroma".
Over the years I added flame-out, whirlpooling, and then dry hopping to my repertoire, but those early years was strictly boil hopping...
Cheers!