Storm Herald,a Barbarian Enhancement Tree.

[EdsanDarkbane]

CORES

CORE 1

CHOOSE ONE. Path of the Desert Walker (Fire)
Path of the Sea Farer (Lightning)
Path of the Tundra Tribes (Ice)
Each Core Provides a stacking +10 Resistance to the energy path chosen. Each Core Provides +2 Melee Power and 10 Hit Points. 1 AP. 1 Rank.
Requires Barbarian Level 1.

CORE 2

Storm Aura-- Stance. While this is active and you are under the effect of Rage, your aura deals damage based on your path as your to all foes in range every 5 seconds, and scales with 180% Melee power. 1 AP. 1 Rank. Requires Barbarian Level 3.

CORE 3

Power of the Storm-- Passive:While wearing Light or Armor, you gain +10 Maximum HP and +5 Magical Resistance Rating. While wearing Medium Armor you are proficient with, you gain +20 Maximum HP and +10 MRR. Passive: Your Storm Aura now affects enemies every 4 seconds. Also gain +1 imbue die. 1 AP. 1 Rank. Requires Barbarian Level 6.

CORE 4

Enveloping Aura-- Passive. Your allies now benefit from you element resistance granted by your Storm Aura. 1 AP. 1 Rank. Requires Barbarian Level 12.

CORE 5

Perfect Storm-- Major Form toggle: When enabled, the storm bears you above the ground, gain Feather Falling, are immune to most knockdown effects, and your Storm Aura gains 3d6 Path damage. Passive: Your Storm Aura now affects enemies every 2 seconds. Stance cooldown: 8 seconds. 1 AP. 1 Rank. Requires Barbarian Level 18.

CORE 6

Eye of the Storm-- Passive: +2 CON, +2 Str, +20% Competence bonus to Maximum HP, While your Storm Aura is enabled, you gain +30 Melee Power.
1 AP. 1 Rank. Requires Barbarian Level 20.


TIER 1

Resilient Body-- +2/+4/+6 PRR 1 AP. 3 Ranks.

Stormy Defense-- While your Storm Aura is active, you and nearby allies get a +1/2/3 bonus to AC. You personally receive +5/+10/+15 Maximum Hitpoints (while Aura is active). 2 AP. 1 Rank.

Resilient Soul-- +2/+4/+6 MRR. 1 AP. 3 Ranks.

What's Best-- +1/2/3 Intimidate, Heal, Balance skills. 1 AP. 3 Ranks.

Hate-- Melee Attack: Deals +(1/2/3)[W] damage and generate extra threat. (Cooldown: 6 seconds). 1 AP. 3 Ranks.


TIER 2

Action Boost Melee Power-- Activate this ability to receive a +[10/20/30] Action Boost bonus to both Melee and Ranged Power for 20 seconds. (Cooldown: 30 seconds) 1 AP. 3 Ranks.

Fast Approaching-- You gain 1% movement speed for every level of Barbarian, while under the effects of Storm Aura. 1 AP. 1 Rank.

Path Protection-- You Gain Protection SLA. Caster Level Based on Barbarian Level. 2 AP. 1 Rank.

Storm's Edge-- Imbue Toggle. 1d6 path damage, scaling with Melee Power. 2 AP. 1 Rank.

Hearty Lifestyle-- +5/10/15 Heal Amplification. 1 AP 3 Ranks.


TIER 3

Stubborn-- You gain +1 to saving throws while below 80% health.
Rank 2: Additional +1 while below 60% health.
Rank 3: Additional +1 while below 40% health. 1 AP 3 Ranks.

Lamentation of your Enemy-- Boast to anyone to gain (25/50/100) Temporary hit points. Cooldown: 12 seconds. 1 AP 3 Ranks.

Hurricane-- +5/10/20% Strikethrough chance. 1 AP 3 Ranks.

Storm Riders Assault-- Depending on your path choice, you gain:
Path of Desert: 5d6 +(character level) fire damage on Confirmed Critical. 6 Seconds. 12 second cooldown.
Path of the Sea: Active Ability. Melee Cleave Attack. +2(w). Enemies make a DC check or become knocked down for 2 Seconds. DC= 10+Character Level+ STR Modifier+ Trip DC's.
Path of the Tundra: Active Ability. Melee Cleave Attack. +2(w). Enemies make a DC check or become Frozen for 2 Seconds. DC= 10+Character Level+ STR Modifier+ Stun DC's.
2 AP. 1 Rank.

Ability-- STR/DEX/CON 2 AP 1 Rank.


TIER 4

Avatar of Storm-- While under the effects of Storm Aura, you are always affected by the Lesser Vigor Spell. +10 Heal Amplification. 2 AP 1 Rank.

Connection of Chaos--When you activate Storm Aura you gain 25/50/100 stacking temporary hit points. 1 AP 3 Ranks.

Raging Aura--While under the effects of Storm Aura, you gain +1 imbue die.

Ability-- STR/DEX/CON 2 AP 1 Rank.


TIER 5

Hit Harder-- Your weapons (but not shields) gain +1 competence bonus to Critical Damage Multiplier.

Primal Titan-- You attract the notice deities. You gain the Death Pact SLA.


Completed Path-- You gain immunity to your Path's Elemental Damage.

[Xgya]

First comment is the amount of energy resist for the cores is VERY high, at least for heroics. Compare Harper's +3 to all resists for 4 total AP. +10 to a single one for 1 AP is a lot.
If you want to keep elemental resistance, here's my take - give it later in the tree (core 3?), just say it doubles the Barbarian's Damage Reduction against that element. Make the Aura version give everyone the benefit of that Barbarian's Damage Reduction against the chosen element. It could go as high as +28% (if you have Occult Slayer cores and the Epic feat) absorb against a single element, which is significant in higher difficulties, relevant but not overkill in lower ones.
The final Core is downright overkill. The tree that gives the most Melee Power in the game right now gives 25 when you add up all its cores. The final boost to melee power on that tree is a +10. Your +30 at level 20 is a tad much.

You also gave one of Bard's most iconic T5s (spinning ice) as a T3. Even with the reduced duration, that's a bit much.

Most Barbarians get access to their primary form of self healing as a T5, yours gains it as a T4. That also flows against current design that tried to avoid Barbs double-dipping on that front.

I do like the idea of an elemental Barbarian taking on a storm and carrying it with them; I don't know how the damage would scale, but it would probably work like Auralocks. The Auralock: Fighter Edition, that gives more focus on the melee and keeps the ticking aura as a secondary but nice added bonus.

I like the theme, but the execution needs some extra work.