Re: The whole P&S discussion in this thread
I have built a dps simulation in excel to test out various talents for myself and one of the things I wanted to test was 2/3 P&S as well as 2/3 Shadowweaving.
My simulator assumes infinite mana, 10min encounter, 0 latency (this needs to be fixed but that's what it is atm) and no need to move/stop casting.
In those perfect circumstances for a 10min encounter you will need to recast SW:P 2-3 times if you take 2/3 P&S. Perhaps that's an argument that you don't need to take 3/3, afterall having to recase SW:P 2-3 times in 10mins isn't that much of a big deal in terms of dps loss and mana burn. However, I don't think enough thought has been put into how this applies in a practical sense. You won't be able to dps 100% of the time in every encounter, encounters will require you to move, dps off if your threat is too high, perhaps throw the occasional heal/PW:S. You certainly are going to lose 6 seconds cast time when you use dispersion, and what about bosses that have high shadow resist? Or even yet, what about gearing up when you don't have 100% hit?
When you evaluate 2/3 P&S with how you dps in a practical sense it's a pretty big risk to take to squeeze all of 1 talent point into something else. I saw how bad 2/3 P&S was when I was doing the HH event, those few seconds of having to switch dps targets resulted in my SW:P falling off nearly every time.
So while maths or even simulations might show 2/3 P&S to be very close to 3/3, in reality it's not and I would expect you to see a significant difference in dps and mana usage if you just take 3/3.