Why not just get the 150 on the lower half of the bag as well instead of bending them to the 150 spec. If anything I would think bending the 150 a degree weak is what I have seen. I am in a similar boat.

All the clubs in the same shaft are the same price. Why wouldn’t you take the time to find a Titleist sponsored fitter and get advise from a professional on what will fit you the best? 3 different clubs is not the norm.
Had I built my own set, I would have had all T350’s with a different shaft. I ended up with T200 and my longest iron is a T350. My accuracy has never been better. Even better, buying those clubs at the fitting, the fitting was free (credit to the purchase). One time free advice was worth the money I could have paid

NOT being a professional fitter, as most of us on here are not, I would recommend seeing a professional club fitter. They have the experience and knowledge to answer your questions and put you in the a correct fitted set of clubs. Those of us on here are loyalists like yourself. A few testimonials are helpful but I always go to a pro for a fitting and we live with the choices we make. That's my 98 cents worth.

As a fitter, I would tell you to just get the T150 as they are 2 degrees stronger than the T100. You will also benefit from having the bounce be designed for the loft. If you bend the T100 strong 2 degrees then you also change the bounce by 2 degrees weaker. This may not be desirable.