I brew NEIPAs fairly regularly, and I've settled on a rather simple hop regime that nonetheless gives me huge flavor and aroma. Most of this comes from a HUGE dry-hop charge (the rate I use is 4-5 lbs/bbl) after fermentation is completely finished. On the hot side, I only hop at flameout for a 20-min steep to extract some bitterness, using of course juicy NEIPA hops. All the other hoppiness comes from the huge dry hop charge, which I leave for 4-5 days. I've experimented on the hot side with, after the flameout charge, lowering the temp to <180 for another 20-min steep addition, and I've also experimented on the cold side with a high-krausen addition (or just after HK) in addition to my standard post-ferm addition. But I don't think the return on these other additions pays off enough. Definitely diminishing returns, and the yield loss is big. Using a rate of 4-5 lbs/bbl for dry hopping, expect a keg yield of only about 60% of what you knocked out. Happy NEIPAing!