Right now i am playing a 910D3 8.5* and have it on standard setup with the lowest loft (d-1 i think)
So the driver is set at 7.75*?
Shaft is the made for Titleist 'Ahina 70 S.
Here is your first problem. If this isn't the first thing someone points out, they aren't too knowledgeable in shafts...
Any shafts made for a particular company is "watered down" or "sub-par" compared to the actual shaft. What it says isn't what it actually is (sorry I don't know the specifics on the variance). Do NOT get a shaft that is made "exclusively for" someone.
i am looking for a shaft that will help with spin reduction, and to keep the ball flight low. I did a fitting last year and he tried to put me in a Proforce V2 70S, which is 76 grams. Though it might have performed well, it felt too much like i was swinging an anvil.
This was my recent venture and exactly what I put in. The shaft has low torque and depending one the kick-point, will keep the ball low as well. The weight is a factor as well (favorable, in this case). The ProForce is a low spin/low flight shaft.
I don't think that the problem is the shaft, but your swing (I don't mean that in a way that says you have a bad swing, but in a way that you may have adjusted to the new shaft in the wrong way).
When you had the 8.5* (or 7.75* in the lowest setting), you were already trying to force the ball flight down, since you wanted an even lower ball flight. When you put the V2 shaft in it, you forcing the ball flight down compared withe the low torque and heavy shaft probably either caused the ball flight to go low and right, or when you did hit one "well", it was on the top of the club face. When you hit the ball left, it probably was just a mid-level pull (let me know if those three things were accurate or not).
If those were the case, I think the problem is that you didn't give yourself enough time to adjust to the new shaft. If that wasn't the case, then I think you may have gone to the extreme of low ball flight, which doesn't result in low ball flight but misses that go everywhere.
If the latter is the case, try putting the loft on the club UP all the way (I'm not sure what that is). If that doesn't help, next try teeing the ball up higher (doesn't make much sense, but trust me). This way, if these fix the problem, then you don't have to change anything major or spend money. If not, next get a shaft that is a little lighter, but not much, and one with a tiny hit more torque. The last thing you want to adjust is the kick-point, since the variance in changing that is larger than changing anything else in relation.
Good luck, and sorry for the novel