Destruction build goes for 120 int (124 for the full set, but normally you'll go for talias instead of the dest pauldron), the priest plate dd +3 is 120 int, the +6 is 126 int, so that means they'll "lose" 6 points to gain 15 DD. So going for the plate dd will mean they'll lose 6 points in hp (probably) but gain 15 DD and also have enough int to wear the dest pauldron (incase they run out of talias ) plus they'll still have their balance of ac & hp if they know how make a decent build.
But if they'd need to go FP (just consider the helmet for now) they'll lose 26 points, which is quite allot. Of course you can say that they'll go fp build instead then, but that would cause them to lose to much ac compared to winning hp.
Now for the HP Stat Points you can extract 32 HP Points (the fp pads +7 need 152 int) you'll be losing going from Destruction build to FP Build, so you'll end up having only 4 HP Points left as "bonus".Code:Destruction build (just dd & talia)Full Plate build (+7 with DD & Talia)
Plate DD Helmet +6/25 44 ac Destruction Boots 75 ac Destruction Gloves 75 ac Destruction Pads 121 ac Talia Pauldron 116 ac Total defense 431 ac HP Stat Points on armor 0
Full Plate DD Helmet +6/25 58 ac Full Plate Boots +7 43 ac Full Plate Gaunts +7 43 ac Full Plate Pads +7 86 ac Talia Pauldron 116 ac Total defense 346 ac HP Stat Points on armor 36
Those 4 HP Points are the same as ~60 HP on a lvl 70 Priest.
So it's either 85 ac or 60 hp, that is pretty much what it comes down to ^^
Also, this was all based on just INT stats, so once you call in the str req stats as well, and just put the str stats at the minimum that you need (for everything that is, armor, shield, hammer), it'll make an even bigger difference
So ye, i do still think they'll go for plate & dest
Atleast i would