Here is how the builds works against the +5 level so far endgame boss

First Look at Storm Active Skills

Ice Shard

This is our main skill to deal damage. It shoot bunch of shard that can deal damage to same target but only catch is extra projectiles deal 20% of the base damage to same target. Currently we have 18 projectile that mean 1 main projectile + 17 extra projectile to hit same target. And if you calculate 17 x 0.2 = 3.4x + 1x from main projectile make it 4.4x dps multiplier when it come to dealing damage to single target. Even if you miss one or two projectile it still at least 4x dps.

Ice Shard - Modifiers

• Infused Shard: This is make our ice shard deal additional cold damage based on the reserved energy we have. That is why we try to reserve as much energy as possible. There are passive and toggle skills to make us reserve energy so we gonna invest in them.
  
• Homing:This is really important because it make projectiles to chase enemies. That both allow it to easily hit same target and make next modifier works with this build.
  
• Chaos: It make you shoot Ice Shards randomly so you cant really aim them anymore BUT because we have Homing and even more Homing power from passives that make it easy to use because they are targeting enemies so good. You can also see how well they works against boss in the video. Main reason why we take this is it give +4 projectile per level so +12 in total. That is huge compare to Torrent we have to take 1 level just to get Chaos
  
• Torrent: Only reason we get this is getting Chaos.

UPDATE:
I drop infused shard to 4 level to level up Homing to level 2 because that now allow me to sit next to boss and spam because with that i dont need to try to keep a distance anymore. Also that make enemy to more vulnerable to cold resistance reduction of ring of flame

---

Storm Nimbus

This is a great buff skill both offensively and defensively. It allow us to reserve energy to make our ice shard deal more damage. Additionally we also get resist from it.

Storm Nimbus - Modifiers

• Storm Enhancement: 40% increased cold damage and extra +50 energy to reserve. Both of those mean damage for our ice shards.
  
• Cold Resistance & Lightning Resistance: Both modifiers works same way. So adjust how many you gonna give them according to your characters resistance need. Spend rest of the points here. They also gives max resist.

---

Cyclone

This is our mainly self buff skill. It follow us and give us increased damage for our ice shards. For that you need to keep it up while keeping amplify stack on 10. Simple recast it when it end and make sure you have 10 stack of amplify as soon as possible and to do that you simple need to cast any skills probably ice shards.

Cyclone- Modifiers

• Personal Storm: This make cyclone also create a smaller cyclone that follow you. This is pretty important if you wanna be mobile. If you dont feels like you need it you can either speck into Blizzard or just simple spend points on somewhere else but i suggest to get it.
  
• Escalation: This is why we take Personal Storm because this modifier give us 40% increased cold damage on max cyclone amplify stack. Also it give qol where it gives us amplify automatically every 2 second. So it is literally one point wonder.
  
• So far this two is enough for me but if later on you have more points i would put them into Blizzard to make it looks cool and deal cold damage.

---

Blink

This is pretty useful movement skill, especially against bosses because from my experience you dont wanna be next to a boss because it make ice shards go haywire so you want to have a medium distance. With Blink you can move to somewher else and return back after boss chase you enough.

Blink- Modifiers

• Repeat: This is pretty good because it allow you to jump more. So far one point is enough but second point also can be good. I dont think you need more than that. I i have more point spend on Blink i would probably either refund them or get Engage maybe.

---

Raging Mind

Raging Mind is pretty good because it gives spell damage, casting speed and crit chance.

Raging Mind- Modifiers

• Cast Speed: Faster is better.
  
• Critical Chance: One of the sources we get our critical Hit chance from.

---

Arcane Influx

This is quite important passive for Ice Shard because of one of the modifiers.

Arcane Influx - Modifiers

• Reservation: This is main reason why we get this passive because this reserve energy and one of the power source for our Ice shard is reserving energy.
  
• Energy: If i had more point i might get this but not sure. Depend if need defense in future.

---

Storm Attunement

Just for getting more damage.

Storm Attunement - Modifiers

• Spell Damage: More cast speed is always good to have and more cold damage.
  
• Projectile Damage: If i had more passive i would get this for more damage.

---

Storm Guidance

This is also pretty much must have and need to max asap.

Storm Guidance- Modifiers

• Homing: Improve homing of Ice Shard. I suggest getting this as fast as possible.
  
• Speed: Mostly for quality of life improvement. Faster projectile is good to have.

---

Storm Adaptation

Purely for defensive. Get this later on.

Storm Adaptation- Modifiers

• Cold Resistance: Read below
  
• Lightning Resistance: Same reason with Cold Resistance. Basically to get more resist and max resist. That gonna make itemization easier.

Now move to Earth Active Skills

Earth Enchantment

Defensive and offensive. Offensive part of this skill come from energy reservation. Remember more energy reservation = More Ice Shards dps

Earth Enchantment - Modifiers

• Fire Resistance: We use it mainly to reserve more energy while enjoying fire resist and fire max resist.
  
• Stone Skin: When you have more passives you should invest into this. Fire resistance and stone skin together make you spend 10 points so you already maxed out. And it is enough for us.

---

Ring of Flame

Almost only reason to get this is huge energy reserving of it. Later on if you really want you can also make it melt enemy cold resist but requires enemy to be too close for my taste but better than nothing

Ring of Flame - Modifiers

• Permanency: This is the core reason why we getting this. This reserve 60 energy.
  
• Weakening Heat: If you have more points you can also invest this. It gonna make enemies nearby standing on your ring of flame losing cold resist.

Now move to Earth Passive Skills

---

Grand Magic

Spell damage and Energy. Pretty good combo and have good modifiers.

Grand Magic - Modifiers

• Spell Damage and Cost: Side effect of spending more energy is not that bad while it give you good damage increase.
  
• Critical Chance: One of the few Critical Hit Chance source so get it.

---

Magma Shell

Storm Adaptation's Earth counterpark. Get it later on for defense.

Magma Shell- Modifiers

• Fire Resistance: It gonna make you gain pretty good fire resist and max fire resist. Gonna take the burden of fire resist from your items.

---

• Spell Damage
  
• Cold Damage
  
• Critical Hit Chance
  
• Energy
  
• Knowledge
  
• Resist
  
• Health
  
• Energy Barrier

---

• Spell Damage
  
• Cold Damage
  
• Cast Speed
  
• Critical Hit Chance
  
• Energy

---

• Cast Speed
  
• Energy
  
• Resist

---

• Critical Hit Chance
  
• Resist
  
• Health
  
• Knowledge

---

• Resist
  
• Health
  
• Energy

---

• Cold damage
  
• Spell damage
  
• Resist

---

• Resist
  
• Movement Speed
  
• Knowledge

---

• Resist
  
• Regens

---

• Critical Hit Chance
  
• Spell Damage
  
• Energy
  
• Resist