OMG! MAJOR spoilers coming! ( could not find spoiler button.)
If I recall correctly, here is still what needs to be included in Season 3 from the remaining nearly 400 chapters, not Necessarily in sequential order:
1. remainder of Ming Arc
2. assassination on way home
3.. Killing of CPP
4. trip to dongyi and acquiring of aces
5. storyline with emperor of northern Qi
6. Haitung and the grasslands
7. trip to divine temple with Haitang, and 13th wang to find Wu Zhu
8. finally, showdown with emperor of Qing ( with tasty side bit of opportunistic climber HZW getting his). You want blood? This part will have lots of blood.
9. And included in all the above is the deaths of elder princess, 2d prince, crown prince, empress dowager, failed revolt at dong on mountain ( leading to the deaths of 2 grandmasters and thousands of troops) and a few other storylines.
I really hope they can finish all that in 40 episodes. They might drop the emperor of Qi storyline but that would be a mistake because that would lead to a plot hole. (Hint- emperor of qing dies with the satisfaction of knowing his line -his seed and seed of seed- will rule the world. )
Maybe they drop the Haitang grasslands arc, since they have thus far played down the “ not quite there” relationship between Haitang and FX. (Read chapter 402 where FX compromises her virtue ( but not sexually), where FX says he does not want Duoduo to marry anyone but him, and where they tslk about a potential marriage (seriously or not), )
A lot of the events are interrelated, and changing them could develop plot holes. i Guess we will have to wait and see.
Doable? Maybe if it is super compressed.