Jewels should be 15% ias and 2% dex. Other stats are a plus.
Rha runes if you lack pierce.
Pierce gear you can look for:
Bow:
Zephyr
Zephyr
Maple Bow (Sacred)
(Druid Only)
Required Level: 100
Required Dexterity: 600
Item Level: 105
Innate Fire Damage: (62.0% of Dexterity)
+1% Attack Speed per 25 Dexterity
Adds 450-650 Fire Damage
-(15 to 30)% to Enemy Fire Resistance
+9 to Heartseeker (Druid Only)
+9 to Cascade (Druid Only)
10% Chance of Crushing Blow
+25% to Summoned Minion Resistances
25% Magic Find
Socketed (6)
Void-Touched
Void-Touched
Maple Bow (Sacred)
(Druid Only)
Required Level: 100
Required Dexterity: 3000
Item Level: 120
Innate Fire Damage: (62.0% of Dexterity)
+5% Innate Elemental Damage per Character Level above 137
15% Chance to cast level 1 Corrupted Vines on Death Blow
Adds 250-350 Fire Damage
-20% to Enemy Fire Resistance
Physical Resist 10%
50% Magic Find
Requirements +400%
Hunter Only Upgrade:
Must have at least 3000 Dexterity
Survive the Edge of Nothingness battle for 11 minutes
Transmute in the Horadric Cube to Upgrade
Socketed (6)
Ammy:
Quov Tsin's Talisman
Quov Tsin's Talisman
Amulet
Required Level: 110
Item Level: 110
15% Innate Elemental Damage
-(20 to 30)% to Enemy Elemental Resistances
Rings:
Bad Mood
Bad Mood
Ring
Required Level: 100
Item Level: 120
-20% Cast Speed
Adds 50-100 Fire Damage
Adds 50-100 Lightning Damage
Adds 50-100 Cold Damage
-(5 to 20)% to Enemy Fire Resistance
-(5 to 20)% to Enemy Lightning Resistance
-(5 to 20)% to Enemy Cold Resistance
Armor:
Flameskin
Flameskin
Scale Mail (Sacred)
Defense: (7200 - 8440) to (8922 - 10307)
Required Level: 100
Required Strength: 1150
Item Level: 120
Adds 5 - 7 Fire Damage to Weapon per 2% Attack Speed
Weapon Physical Damage -150%
1% Chance to cast level 6 Life Spark on Striking
-20% to Enemy Fire Resistance
+(150 to 200)% Enhanced Defense
+(1000 to 2000) Defense
Maximum Fire Resist +2%
(50 to 75)% Bonus to Defense
Requirements +100%
Socketed (6)
Belt:
Nature's Embrace
Nature's Embrace
Light Belt (Sacred)
Defense: (2202 - 2752) to (2286 - 2857)
Required Level: 90
Required Strength: 550
Item Level: 1
+1 to Druid Skill Levels
25% Attack Speed
-10% to Enemy Fire Resistance
+(100 to 150)% Enhanced Defense
Maximum Life +3%
Socketed (2)
Caoi Dulra
(Druid Hunter Set)
Quiver:
Kingsport's Signals
Kingsport's Signals
Arrow Quiver
Required Level: 110
Item Level: 120
1% Chance to cast level 36 Rain of Fire on Striking
+1 to All Skills
-20% to Enemy Fire Resistance
Maximum Life +3%
+5 to Light Radius
Gloves you can craft a Fascinating or Abandoned with +2 druid, 25% ias and pierce. My choice would be Abandoned since gloves can spawn with 15% pierce.
With the charms you mentioned plus a Astrogha Trophy you can reach around 150~160 pierce.