hey there... Its me again

I am a lvl 48 BOWER currently 47 PACH/32 FIRE/20 COLD/30 LIGHT (This is my masteries)
I am playing on ECSRO so the cap is 90 ... I wanted to know wht is the best for a SLIGHTLY hybrid BOWER for PVP!!
Shall i make it:
90 PACH/90 FIRE/90 ICE/30 LIGHT
90 PACH/90 FIRE/90 LIGHT/30 ICE...
I am thinking of going the first option for PVP and i heard its the best for GRINDING in DEFENCE...
Q2: What is better for PVP?? Ice WALL or Fire WALL....
(Which one do i lvl up??)
Thnx in ADVANCE
~Karimgh