I respec'd my cold sorc to poison for a bit the other day to farm astrogha. I tried out farming Scos with it too and it actually felt pretty good.
I used
Helgrotha


, 


Helgrotha
Sorceress Orbs
'VenVenIth'
Runeword Level: 100
+2 to Sorceress Skill Levels
1% Base Block Chance
50% Cast Speed
+15% to Poison Spell Damage
-60% to Enemy Poison Resistance
25% to Energy
Maximum Life +7%
Sorceress Orbs
'VenVenIth'
Runeword Level: 100
+2 to Sorceress Skill Levels
1% Base Block Chance
50% Cast Speed
+15% to Poison Spell Damage
-60% to Enemy Poison Resistance
25% to Energy
Maximum Life +7%
Venefica

, 

Venefica
Sorceress Body Armors
'GhalShael'
Runeword Level: 100
+(4 to 5) to Sorceress Skill Levels
+(120 to 130)% Bonus to Poison Skill Duration
+15 Spell Focus
0.5% to Poison Spell Damage (Based on Character Level)
-15% to Enemy Poison Resistance
Attacker Flees after Striking (21 to 25)%
+(172 to 200)% Enhanced Defense
Requirements -20%
Sorceress Body Armors
'GhalShael'
Runeword Level: 100
+(4 to 5) to Sorceress Skill Levels
+(120 to 130)% Bonus to Poison Skill Duration
+15 Spell Focus
0.5% to Poison Spell Damage (Based on Character Level)
-15% to Enemy Poison Resistance
Attacker Flees after Striking (21 to 25)%
+(172 to 200)% Enhanced Defense
Requirements -20%
Angel of Death
Astrogha's Moon
(Wyrd Set)
, 
Angel of Death
Amulet
Required Level: 90
Item Level: 123
2% Chance to cast level 33 Punisher Bolt on Striking
+(0 to 2) to All Skills
+(11 to 30)% to Poison Spell Damage
-(6 to 15)% to Enemy Poison Resistance
Amulet
Required Level: 90
Item Level: 123
2% Chance to cast level 33 Punisher Bolt on Striking
+(0 to 2) to All Skills
+(11 to 30)% to Poison Spell Damage
-(6 to 15)% to Enemy Poison Resistance
Astrogha's Moon
(Wyrd Set)
Indigo

, 

Indigo
Circlets
'UnTaha'
Runeword Level: 110
+2 to All Skills
+100 Spell Focus
50% Cast Speed
-(15 to 20)% to Enemy Elemental Resistances
-500 Defense
Maximum Elemental Resists +2%
Elemental Resists +(13 to 15)%
Requirements -100%
Circlets
'UnTaha'
Runeword Level: 110
+2 to All Skills
+100 Spell Focus
50% Cast Speed
-(15 to 20)% to Enemy Elemental Resistances
-500 Defense
Maximum Elemental Resists +2%
Elemental Resists +(13 to 15)%
Requirements -100%
Dementia
, 
Dementia
Belt (Sacred)
Defense: (3111 - 3348) to (3272 - 3524)
Required Level: 100
Required Strength: 690
Item Level: 120
-(15 to 20)% to Enemy Elemental Resistances
+(15 to 25) to Fowl Fight
Slow Target 5%
+(120 to 140)% Enhanced Defense
+500 Defense
Maximum Life +2%
Maximum Elemental Resists +1%
Physical Resist 5%
Requirements +20%
Socketed (2)
Belt (Sacred)
Defense: (3111 - 3348) to (3272 - 3524)
Required Level: 100
Required Strength: 690
Item Level: 120
-(15 to 20)% to Enemy Elemental Resistances
+(15 to 25) to Fowl Fight
Slow Target 5%
+(120 to 140)% Enhanced Defense
+500 Defense
Maximum Life +2%
Maximum Elemental Resists +1%
Physical Resist 5%
Requirements +20%
Socketed (2)
Vaetia's Wall
, 
Vaetia's Wall
Tower Shield (Sacred)
Defense: (4603 - 5157) to (5543 - 6210)
Chance to Block: -1% + Class%
(Sorceress Only)
Required Level: 100
Required Strength: 460
Required Dexterity: 471
Item Level: 105
-1% Base Block Chance
-(11 to 15)% to Enemy Elemental Resistances
+(4 to 8) to Vengeful Power (Sorceress Only)
+(4 to 8) to Warp Armor (Sorceress Only)
+(4 to 8) to Snow Queen (Sorceress Only)
+(4 to 8) to Living Flame (Sorceress Only)
+(141 to 170)% Enhanced Defense
Maximum Mana +(11 to 25)%
Maximum Elemental Resists +(0 to 1)%
Requirements -20%
Socketed (4)
Tower Shield (Sacred)
Defense: (4603 - 5157) to (5543 - 6210)
Chance to Block: -1% + Class%
(Sorceress Only)
Required Level: 100
Required Strength: 460
Required Dexterity: 471
Item Level: 105
-1% Base Block Chance
-(11 to 15)% to Enemy Elemental Resistances
+(4 to 8) to Vengeful Power (Sorceress Only)
+(4 to 8) to Warp Armor (Sorceress Only)
+(4 to 8) to Snow Queen (Sorceress Only)
+(4 to 8) to Living Flame (Sorceress Only)
+(141 to 170)% Enhanced Defense
Maximum Mana +(11 to 25)%
Maximum Elemental Resists +(0 to 1)%
Requirements -20%
Socketed (4)
Memory



.



Memory
Gloves
'IgnVenFulGla'
Runeword Level: 100
+1 to All Skills
+(40 to 50) Spell Focus
10% Cast Speed
+(8 to 10)% to Spell Damage
-11% to Enemy Elemental Resistances
+100 Life Regenerated per Second
Gloves
'IgnVenFulGla'
Runeword Level: 100
+1 to All Skills
+(40 to 50) Spell Focus
10% Cast Speed
+(8 to 10)% to Spell Damage
-11% to Enemy Elemental Resistances
+100 Life Regenerated per Second
One rare ring with +1sk, poison spell dmg, -poison res. One
Sigil of Tur Dulra
. and some Shimmering crafted boots.
Sigil of Tur Dulra
Ring
Required Level: 100
Item Level: 105
+(1 to 2) to Druid Skill Levels
+(15 to 20)% Bonus to Poison Skill Duration
20% Cast Speed
-(1 to 10)% to Enemy Poison Resistance
Elemental Resists +(20 to 25)%
Ring
Required Level: 100
Item Level: 105
+(1 to 2) to Druid Skill Levels
+(15 to 20)% Bonus to Poison Skill Duration
20% Cast Speed
-(1 to 10)% to Enemy Poison Resistance
Elemental Resists +(20 to 25)%
So pretty similar gear overall.
Helgrotha


seemed really good for killing Astrogha, but Gravetalon's probably way better for farming Scos. My tree was similar too but I didnt have as many points in Raven, but definitely should have. I think I was around 170% poison pen or so when it was all said and done. Overall it actually felt pretty good in Scos. The damage was a bit less on the trash mobs (a lot of the trash mobs have poison absorb which makes them a pain), but farming the trees and elementals was very easy dropping arachnomancy on them. I was almost tempted to stay poison over cold - which i may have to try again with your suggestions.


Helgrotha
Sorceress Orbs
'VenVenIth'
Runeword Level: 100
+2 to Sorceress Skill Levels
1% Base Block Chance
50% Cast Speed
+15% to Poison Spell Damage
-60% to Enemy Poison Resistance
25% to Energy
Maximum Life +7%
Sorceress Orbs
'VenVenIth'
Runeword Level: 100
+2 to Sorceress Skill Levels
1% Base Block Chance
50% Cast Speed
+15% to Poison Spell Damage
-60% to Enemy Poison Resistance
25% to Energy
Maximum Life +7%