trinket choices (LFR Versions) - which to use?

[Unforgivenn]

Well, currently, i got 3 LFR Trinkets: Purified Bindings of Immerseus, Black Blood of Y'Shaarj and Kerdris Toxic Totem.

they are good, currently using immerseus + kerdris, but black blood gives some good stats, howeover the int bonus its increased by time, unlike all other 2 ..

which is the best combo for destro lock ?

[Turturin the Warlock]

PBoI for sure.

KTT vs Black Blood is pretty close at same ilvl. If you could be assured of maximizing every BBoY proc it would win, but realistically that's not possible. Most people (self included) would probably go with KTT. It's more reliable/flexible since you can freely dump CB's anytime during its proc

[Yusero]

I agree with Turturin. That´s the best choice.