First Look @ Summon Raging Spirit

*Faster Attacks (support gem)
*Added dmg (support gem)
*elemental % dmg nodes
*Increased Duration
*Minion dmg nodes + items + Gem
*+ Fire Gem Level
*Ancestral Bonds (The no Character DMG part)
*Anger and Wrath both deal INC DPS with spirits
*Hatred doesn't seem to boost DPS at all, but does add cold dmg allowing them to chill (possibly freeze?)(I only have a low level Hatred might work with a higher level 1)
*Haste (I believe Attack speed does, but Movement speed doesn't. Need a leveled Haste Gem to test further)
*+Duration Nodes (While it doesn't state it in tooltip that they last longer, that actually do)
*Remote Mine (Skill Gem)
*Trap (Skill Gem)
*Spell Totem (Will only summon Spirits if enemies are within Totems cast range)
*Flesh Offering (Attack Speed)
*Melee Physical Damage Gem
*Melee Damage on Full Life
*Melee Splash
*Cast on Damage Taken
*Multistrike
*Cast on Critical Strike
*Chance to Ignite
*Increased Burning Dmg (but it's very insignificant)
*Cast on Melee Kill
*Auras from Dominating Blow, and Allies

*Fire % nodes and Fire % from items (Will continue to test it)
*Spell % from nodes and from items (Will continue to test it)
*Weapon elemental gem (needs further testing I think)
*Fork (Guessing dmg reduction still applies while more spirits aren't made same as LMP)
*LMP (Lesser Multiple Projectiles)(while it doesn't make more spirits the dmg reduction still applies to the skulls)
*GMP
*Chain

*It seems that their life isn't a specific number (I.E. like they have a life total of say 100 or 2057), but instead have a life total based on number of hits they sustain from any given attack. (I.E. Like they can take 3 projectile shots before dieing regardless of monster level, or 2 Melee attacks before dieing regardless of monster level.)

*Not sure if they are Main Type DPS of Fire or just a subtype since Fire % doesn't affect them as far as I can tell... But they can ignite. Thus leading me to believe it is a subtype, not affecting their dps, but they have innate Crit Chance and if they crit they can ignite an enemy.

*Spirits movement is not impaired by height elevations (Cliffs) or Abyss (Vaal Pyramid)

*While I personally believe their main type DPS is Physical, they have a subtype DPS of Fire. Meaning they deal Physical DPS, but if checked through resistances and crit chances it counts as Fire as well. (Could be wrong. Just a personal theory)

*Skulls CAN miss attacks.

*Skulls will target nearest enemy within your sight range if your mouse isn't hoving over an enemy or targeted at an enemy upon casting. Skulls will travel to enemy targeted upon, but will stop if any enemies are in the way and attack them instead.

*Skulls can target off screen enemies if you had sight of them at one point.

*Skulls can be targeted by melee auto attacks, but happens rarely. Can be hit by projectiles, AoE, and Chaos Dmg Over time. Burning Ground seems to have no affect on them.

*Can be Cursed.

*When summoning a raging skull, the area in which they are spawned does cause enemies dmg if they are standing near the area where the skull was spawned.

*Levels on this gem don't seem to increase max skulls able to be summoned or Duration of skulls.

*As far as I can tell SRS (Summon Raging Skulls) base dmg does not scale off from weapon dmg. But the tool tip does display random stats from the weapon it is link to.
(Stun duration, Mana gain on kill, Life Gain on Hit)
(It seems to take specific Explicit Factors and any Implicit Factors from the weapon)
(Also added dmg from a weapon doesn't seem to boost Skull dps at all).

*+ Spell Gem Level
*+ Minion Gem Level
*Totems (totem % dmg nodes)
*Traps/Mines (Trap/Mine % dmg nodes)
*Spell dmg % nodes
*DMG Auras (Conversion Trap)(I'm guessing all auras should affect it in someway.)
*Increased Crit Chance/Damage (not sure if nodes would affect it as well as unsure if the summons themselves get a passive crit chance or their crit chance is linked to the gem.)
*Minion Speed Gem
*Fire Pen
*Faster/Slower Projectiles
*Projectile Nodes

Various Builds and Characters of Varying Levels. (Marauder, Templar, Witch, Scion)(Lvls 3-83)

For Fire and Spell dmg, Searing Touch and various spell % items.

For Fire % nodes, various Fire % nodes

Various Skill Gems

Various Locations (Norm: Mud Flats, Ledge, Docks, Fetid Pools, Ship Graveyard. Cruel: Docks)

Cloak of Flame does seem to apply the 10% chance to ignite onto the Skulls from what I've seen. So my guess Searing Touch's Inc. Burning DMG should apply but still haven't verified.

Also each time they have ignited enemies... the ignite damage was so insignificant that they died to normal skull attacks before the burning dmg had a chance to do any really dmg at all.

Increased Gem levels give higher Skull dps and mana cost. Skull base dps is unlisted still, But base dps does go up.