what should i socket?

need some opinions, im happy i now have occy, shako, and a lidless wall for my blizz sorc, im using it to mf stuff, i ONLY blizzard maxed and its syns, i dont have attacks from any other tree (except for static field if that helps) so cold immunes = avoid at all costs for me
with what i have, what should i socket and what should i put in the socket, i still die kinda easily.. i think my life is up just under 800hp, mana is nice at 800+ i dont even look at my def because i suck so bad it doesnt make a diff!
so what do the pros do with their socket opportunity?

socket and PTopaz shako, or Socket and Um Lidless