1k mana is not needed
i have 8xx and it works very well.
i prefer bk's or bk/fc ring instead of sojs - why use a soj one a vita sorc?...
and mara's is not really needed - u get maxres without - use a +3light life amu
boots: wt are ok for mf but aldurs or ww's are better as normal boots (life/res)
gloves: why using magefists if trangouls give you +30%coldres?
and dont forget fhr on a vita sorc: 60fhr is absolut minimum - better would be 86
thats all...with around 7sk in the inventory you get about 47k dmg and they are really nice to play -
lightsorc is my favorite char in this game