=-=-=-=-=-=-=-=-=-Opener & Rotation-=-=-=-=-=-=-=-=-=
What's an opener?
An opener is the stream of spells and items that you use at the beginning of the fight in order to squeeze in as much initial DPS as possible.
Torture followed by Scorching in order to get an instant 100% determination.
Spells with (+) in-between indicate that you must press them all in a close timeframe, as to not waste their durations.
Make sure to use a spell in-between Phantom casts, such as Astral Venom, Scorching, and Agony.
Mental Link → Torture → Scorching → Concentration + Meditation + Superiority + Brainstorm + Mental Oppression → Agony → Phantom (until CD) → Astral Venom → Scorching → Vertex → Scorching
What about the rotation?
Simply put, rotation is a collection of spells strung together in a harmonic fashion in order to output the most desired result in the most efficient way possible.
What does it mean for us, MMO players? It means that it's a loop of spells you cast in succession in order to do the highest possible DPS.
Here's the tricky thing, though... Psionicist is a class that doesn't really have a set "Rotation", as it's circumstance-based.
Allow me to break it down even further; Psionicist is a decision-making class, in which the spells you use are dependent on the amount of stress that you have. However, it has priorities.
During your rotation, when faced with high stress, my opinion regarding the priority of spells is the following:
1) Agony
2) Phantom
3) Scorching
Onto the rotation itself: For single target, you will mostly be alternating between Astral Venom and Scorching, as both synergize perfectly with the 1-2 nature of Breakdown and Pyrolysis.
While using the aforementioned spells, you will also check that Agony is applied at all times, as it's your number 2 damage dealer, and great applier of Breakdown. Furthermore, you must make sure to summon phantoms whenever available, do not, however, summon more when you have 6 on the field.
For AoE, you must make sure to use Eye of the Void to group them up, then Blade Storm on the Mentally Linked target, followed by Agony, then spam Scorching to squeeze in as much DPS as possible. Of course, you must also use Vertex, Decomposition, and stay close for Dominion to do its damage, while using Psychosis when you raise your stress high enough from spamming Scorching. Don't forget Torture!
-=-=-=-=-=-=-=-=-=Stats=-=-=-=-=-=-=-=-=-
Stats are entirely dependent on which content you're running. As for me, I use the following:
Determination: 1100
Brutality: 650
Vitality: 400
Bloodlust: 600
Caution: 500
Since we can immediately achieve 100% determination from the get-go thanks to Torture, I skip proficiency in its entirety, as determination is more valuable.
Brutality is self-explanatory, as it favors long fights, which is what most of end-game content is.
The defensive stats are allocated averagely, similar to most other players.
=-=-=-=-=-=-=-=-=-Ending Note-=-=-=-=-=-=-=-=-=
Psionicist is the most fun I've had in an MMO in a while. A fresh and unique class, especially with its stress bar.
I sincerely hope that you enjoyed my guide, and I extend my thanks for reading this far. Take care! 