Really depends on what you want to brew. Based on the OG I'm assuming a hoppy APA?
I'd bitter with 35 IBUs worth (60 mins), flavor with 15 IBUs worth (15 mins) then do an ounce at flameout and dry hop with an ounce too (assuming a 5 gallon batch).
BTW - I've never gotten the cat urine thing from Chinook. Definitely from Citra and sometimes Simcoe, but not Chinook.