Decided to give solo dealing another try after Lord Azoth release and got much better results this time around. P3 is the biggest issue, where 10-15 seconds could be saved with laser mechanic activating earlier. Other things like having 30 Aquarius stacks and timing skills better in P2 could also save a couple of seconds. Under ideal conditions, I think 2:40 or less is possible for NI.
Thank you to all the supports who helped me in my attempts!

Thumbnail done by friend MinorCrisis:
https://www.youtube.com/channel/UCx-apggZunJ3dhgbFKMI0EQ

Equipment:
+12 Vestige of Soul Weapon - Stage 5

P1 and P2 (20% RoF/GP)
+11 Crimson Top R.21 (Rain of Fire 10%)
+11 Crimson Bottom R.21 (Giga Prominence 10%)
+11 Crimson Glove R.21 (Rain of Fire 10%)
+11 Crimson Shoes R.21 (Giga Prominence 10%)

P3 (40% GP)
+11 Crimson Top R.21 (Giga Prominence 10%)
+11 Crimson Glove R.21 (Giga Prominence 10%)

Synergy:
IM RH TB MN EW NP

BGM:
https://youtu.be/wdUPFDf64w0

#Elsword