Alright let me give you my opinion about pure int s/s

If you want good 1v1 pvp, you WILL need bicheon tree maxed..
KD/Stab will do you good vs other nukers, and also vs pure strs(especially when your snow shield runs out)..
Also the phy def shield buff can come in handy just as the chain that causes certain statuses are good to use..
And also in group pvp you can help out your group by kd'ing when its needed..
However for group pvp; your real job isnt to kd, your job is to pull out as much damage as possible..
So if you mostly going to be group pvping(with a good party ofcourse) you will be more valuable to the party with 90fire/light/ice, because that way you will do max damage with nukes, and you will also be able to survive very well with the phy def and snow shield ice gives you..
120sec of snow shield should be enough time to determine which group will win the battle for your trade/robbery(whichever job you are doing..) so you also wont need the phy. def shield buff that bicheon will give you..
And for pve its an rather easy decision, because you wont be using as much phy. attacks anyway while leveling/plvling..
Hope this helps..
Note though; these are my OPINIONS, and i just want to help out..
If theres any adjustements/disagreements please tell ^^
TM.