what stone should I put for rune's weapon?

i think rune need not survive so long,i alawys stay in arena with other fellows fighting,i am weak for all of the human but my skills are pain for them

i have elite armor+6 and Torment Arm ED RARE Int Ring,i got 2,and 1 torment necklace folo YatZee Stat And Skill Still Cant Survive From enemy~

waa... trhen the best stat 4 rune is..?? my rune now 188dex 80 con n rest int skill 4.0-gia,lighting n poison 4.6-instant damage dark-3.5 WE-1.4 evade-2.0 i think.. did it nice..?