I think people tend to overthink these sorts of things.
How do the Kings beat the Warriors? They don't.
So far no team in the NBA has been able to topple the Warriors in the last two years and for a perennial lottery team to focus on how to beat the best team in the league is a bizarre place to start anyway.
The goal should be, how do the Kings finally win more games than they lose?
And that, to me at least, is a question with a pretty straight forward answer. It starts on a page like this where you can sort team statistics.
http://www.basketball-reference.com/leagues/NBA_2016.html
If you sort them by opponent FG% you'll find that of the 10 worst teams in terms of Opp FG% 9 of them were lottery teams with only the Pistons barely making the playoffs. In fact, all six of the worst teams last season occupy the first 6 slots in terms of worst opponent FG%.
And on the other side, of the best 10 teams in the league in terms of Opp FG%, 8 of the 10 were playoff teams with only Chicago (who barely missed the playoffs and are still largely the roster that Thibs made a defensive powerhouse) at 7 and surprisingly the Knicks at #10. The first 5? Atlanta, the Clippers, Golden State, San Antonio and Oklahoma City.
In a lot of ways is really is that simple. You want to improve? Fix the defense. Increase the effort and the results on that end and the team will get better.
As for the offense? If you're building around Cousins you get guys that compliment him. An athletic, low usage, defensive PF. 3& D perimeter players at least one of whom is a great defender. A complimentary secondary scorer. A playmaker either at PG or possibly at one of the wing positions. A stretch 4. A solid backup center. A sixth man who can get hot in a hurry. A change of pace PG.
We can argue how many of those pieces the Kings have (WCS fits the first one pretty much to a T) but that's the type of roster you want to build around Cousins.
Is Rudy good enough to be a #2 guy on a good team? If not, can the Kings somehow get a #2 guy so he can play the role of the #3 scorer? Or what could they get for him in trade?
Are Rondo's poor/reluctant shooting and lack of effort on defense too big of liabilities to work around and succeed?
Who can they get to be a starting SG?
How important is a stretch 4?
What should they do with their draft pick and caproom?
All questions that need to be answered, but the reality is that most of this is pretty common sense. Improve the team defense, get players that compliment Cousins, including a legit second option (this is the toughest task if the determination is that Rudy Gay isn't that guy) and a solid bench and win games. Beat the Warriors? No. Not be in the lottery for the first time in what feels like forever? Absolutely.