Here's the thing. IMO IPAs, BIPAs, DIPAs, and IMP IPAs need to have a equal-ish balance of hops to alcohol. Unless you're brewing a sweeter beer, you want the IBUs to be high enough to balance out the alcohol. I've only been brewing since September so I don't know even 1% of what some of these seasoned brewers do, but I've had great success with my IPAs because I balance out the ABV and IBUs. Any time I brew an IPA, DIPA, IMP IPA, or BIPA, I use a 1:1 ish ratio. If I'm aiming for my beer to be 7-8% ABV, I go with 70 to 80 IBUs. My first Imperial IPA was 12.7% ABV, and the IBUs were in the 120s. I took that beer to a Homebrewers Assoc. meeting and now they want me to brew it for the VIP room at our annual Beer Fest this September. The first time I made a BIPA with the 1:1 ratio, it was a mistake due to my accidentally adding too many hops to the boil, which turned out to be a major game changer for me. The BIPA ended up being around 6.5% and the IBUs just so happened to be around 68, which was perfect. Luckily I take extensive notes so I was able to see where I added too many hops and was happy I did. Just my 2 cents.