I am not a fan of changing the loft on irons, especially cast clubs. Lie angle yes but loft messes with bounce designed for that loft. Change shafts or consider the T100S.

With all the dozens of shaft options, I’d try more before forking out over a grand. If the flight is too high, you should find another shaft.

The T100 has traditional lofts. The T100s is similar to the T200 in lofts. More important than the loft is how the flight fits “your window” and how the distance gaps work out for you. Changing the PW but not the 9 iron might give you closer to a 20 yard gap.

The T100S and T200 have the same lofts in the long irons and T200 are 1* stronger 7-PW.
If you want lofts to match your power spec without bending them you would be looking at the T300. But, those are made to launch high, so it probably wouldn't work. The T200 is also built to launch high.

If you bend the lofts stronger you will increase the offset of the iron and change the bounce. Your pro shop might not be able to bend them. The Roger Dunn's in my area only bend forged irons.

Find somewhere you can test a T200 with Dynamic Gold X7 shafts and KBS C-Taper.

What's wrong with your i525, those things are new. It seems like a waste, I think you should just wait a few years when looking for new irons. If you are hitting it really high, a swing change will make much more significant difference than changing brand new game improvement high launch high forgiving irons irons to other game improvement high launch high forgiving irons.