Not sure what you deem 'classic'? But if was me, I'd ditch the 20 and 15 minute additions for sure. Heck, I don't add 10 minute either to ipa's. My late additions go in at 5 and flameout and whirlpool. Then dry hop with 1-2 oz. YMMV.
*your hop choice should give you a nice citrus/pine brew.