pvp- CS or PS?
I like to run different builds based on how squishy the other comp is.
CS D/P for against squishy comps.
PS D/P against semi-squishy comps.
S/D against more tanky comps.
https://www.youtube.com/channel/UCK3wy8xit2wonN7LouDJQ3w
http://www.twitch.tv/havocgw2
For me :
CS Thief are finishers. They are better roaming around the mid and finishing the enemies that try to run with low hp. They do wonder against squishy with their burst, but lack in constant dps for those longer fight.
PS Thief lack in burst, especially against those fleeing enemies, but make up with a more decent auto-attack, which make them better in longer fight. They also thrives in fight against Warrior. Steal + Whirling Axe + Improvisation is a powerful combination.
I usually use CS Thief against team with 2+ squishy (Ranger especially) and zero or 1 warrior.
I usually use PS Thief against team with 2+ warrior and low amount of squishy.
Anywhere in between is pretty much a guess and depend on what you prefer.
Due to the CS build having little to no condi clear (depends on the heal you take) I only take it when against a highly power based group and then if there’s a strong likelihood of condi on the other team I use PS build.
Hope that helps and if you have any more questions I’ll try to answer as best I can.