You don't have to skip a bittering addition if you want smoother, more mellow, hop quenching, and highly drinkable.
These goals, and other improvements, can be better attained in an IPA by:
Replacing rich, nutty Victory with Light Munich, or none of these
Adding Wheat malt for head retention
Adding Corn sugar for dryness
Mashing between 149-151 F
Lowering the current OG and FG to 1.062 / 1.010
Using a lower cohumulone, less harsh hop for the bitter
Bittering with 20-30 IBUs, or FWH as some like to do
...And Hopbursting with the majority of your hops late (15-0) -- You don't have to go crazy with hopping every 5 minutes though as long as you hit your target IBUs.
People typically dryhop anywhere from 5-14 days. Your choice. But half of us don't experience those grassy flavors. I'd add another oz. for a 5 gallon batch though and do a standard 7 day dryhop (less time, but not too less, and more dryhops). Maybe add a fruity hop like Amarillo for added complexity.
Are you doing a full volume boil with no top off water?