I think you will find most fairways sets using the same shaft and then the heavier going to the hybrid clubs as they get significantly shorter in length.

Same shaft in the Driver and Fairways for me.

I try and keep same shaft and grams and flex for my Driver, 16.5 and Mini Driver for consistency. Seems to work fine for me. Switched to Diamana red shafts..

I used to play a 10g heavier shaft vs driver in my 3 wood, and 5 wood. Ie; 60g, 70g, 80g.

I recently switched to a 4 wood and a 7 wood, and found the same formula didnt work as well. Currently playing a ventus blue velocore plus TR 5s in driver, 60g ventus blue plus in the 4 wood, and a 70g ventus plus red in the 7w and really enjoy the setup. Previously never played a 3w shaft lighter than 70g.

I use same brand. 55 in driver, 65 in fairways and 75 in hybrids. All regular shafts.

I'm set up the same way --- 10g heavier in the fairways ...

For me,
Drivers in 60 gr.
Fairways wood in the 70 gr.
Hybrid in the 80 gr.

But I am always verify that swing weights are in D3 .

It's an old assaumption that you need to step up the weight as you go through the line. Depends on what you are looking for from each club, and a club fitter can help you achieve your desired result better than the old assumptions. I play 3 different shafts for my driver, 3 wood, & 5 wood. All 60 gram class Graphite Design.
I tend to put too much spin on my driver so they gave me the AD-XC shaft. They assumed that due to my age I should be in a 50 gram shaft, but I was getting better results with the 60.
I use the 3 wood probably 80% off a tee and 20% from fairways and went with the AD-DI. A little more spin and higher loft, and the 60 worked best for me.
My 5 wood is pretty much a fairway & light rough club, and has the AD-VR shaft. About the same spin and loft as the DI but swings smoother, and again the 60 gram works best for me.
Stepped up to the AD DI Hybrid 70 gram for my U505 utility 4, and the 80 gram for my 5 hybrid. The U505 has been misbehaving for the last month, and I'm hoping it's just the seasonal flu.