Spriggan Form
Passive taken: Huntersbane
“Your Vines now cast thorns from range, instead of using a melee attack. This is affected by nodes on this tree that affects Spirit Thorns, but they only fire 1 projectile and Great Vine fires 3 projectiles.”
Passive taken: Branch Storm
“Spirit Thorns has a chance to pierce enemies (continue through targets they hit) and they penetrate enemy physical and cold resistance.”
These passives SHOULD work together.
Even with 4/4 points in Branch Storm (80% pierce chance), the Vines projectiles DO NOT PIERCE.
Visually they stop on the first target they come in contact with. Damage numbers also do not pop up for any other targets other than the first target. Even if multiple targets are lined up behind the initial target.
For the record, im using the additional passive to get the larger vines
Passive taken: Great Vine
“You can now only summon 1 Vine at a time up to a maximum of 6, but they have significantly more health, size, threat generation and their melee attacks deal significantly more damage in a larger area (all multiplicative with other modifiers).”