Hi, I want to make a Night Lord, but all those hp washing requirements kind of threw me off. So now I'm curious about what I will be missing if I do not HP wash it. I know HT (and eventually PB) will be a problem but other than that? Thanks in advance.
Absolutely nothing. No clue about PB, but with HB you should be able to HT at 155, and Zak at 135. HP washing just allows you to boss earlier, and makes it easier to survive bossing and regular grinding.
Some bosses like pap clock, pianus, anego etc (especially now that they added bombs) can hit kinda high damage so you'd probably die without washing. Also more hp can help you tank more than 2 hits when grinding/doing zak so you can chat the whole time and not die lol
With the addition to ninja castle coming in (not sure if you saw the teaser), I don't think you will be able to tank any hits from their attacks unless you are higher level with hyper body.