Highlight (Level 86 stats)
Level 20 Arctic Armour
3 auras : Determination, Haste and Clarity
High Armor : 11,500, self buffed with Molten shell (20 seconds + duration)
Decent Life : 4,250
73% chance to shock with Arc
Very high casting speed : +134% casting speed with Arc and Storm Call
Arc dps : 21k dps x 5. 0.34 sec cast time
Storm call dps : 5140 damage per Storm. 0.23 sec cast time. (22,3k dps)
(Arc and Storm Call dps numbers do not take shocks bonus into account)
Main Skill : Arc
Kaikua's main skill is Arc supported by Power Charges on Crit + Faster Casting + Lightning Penetration + Increased Critical Damage (5L). With 7 Power Charges and self-buffed (Haste), it deals around 15.5k tooltip dps. If you consider lightning penetration to be at least 35% more damage, the real dps is 20.9k (15.5*1.35). Chances to shock with passives (25%), level 20 conductivity (14%) and quality Arc (20%) is 59%. If you add 33,4% chance to crit to that number, actual chance to shock is 73%. I use Arc for most content except for single targets and large groups (10+). (Edit : I expect Arc to work much better for large groups now that it chains 4 times)
Large groups and Single target skill : Storm Call or Spark
Storm call is supported by Faster casting, Lightning Penetration and Increased Critical Damage (4L). With 7 Power charges and self-buffed (Haste), it deals around 5,140 tooltip damage with a cast time of 0.21 second. That means you can cast Storm call 7.14 times in 1.5 second. Multiplying 5,140 by 7.14 gives 37,700. In other words, without counting shock bonus, I'll deal 37,700 damage every 1.5 second with Storm Call. In term of dps, it means 25,133 dps (37.7k/1.5)
For some content, I find Spark to work better than Storm Call, especially against fast moving bosses. But since you can use Spark with the same support gems (Lightning Penetration, Increased Critical Damage and Faster Casting), you can simply switch the 2 gems (Spark and Storm Call) depending on the content you're facing.
Eldritch Battery : Converts all energy shield to Mana.
I use None.
However, it's not a bad idea to use a cheap well-rolled Moonsorrow Wand if you can't find a better rare. Other good/interesting unique choices include the Voidbattery wand, Rathpith Globe shield, Maligaro's Virtuosity gloves, Windscream boots, The Taming (ring) and Berek's Grip (ring).
The build benefits from -12% mana reservation passives in addition to a large amount of mana thanks to Eldritch battery. This allows the character to use 3 Auras. I normally use Haste, Determination and Clarity (level 20). In addition, the build provides +28% to aura effect. All in all, it means that Haste provides an additional 20% casting speed while Determination provides 65% more armor. Since then build already provides 104% increased armor, it means that every point of armor I get from gear is multiplied by 2.7. Finally, level 20 clarity provides an additional 33 mana per second. With the +135% mana regen provides by gear and passives, the 33 mana/sec translate into 77 mana per second.
While running some specific maps mods, it is sometimes a good idea to use different auras than the usual ones. For example, in "Elemental Weakness" maps, I usually run Purity of Elements instead of Clarity. To compensate the lower mana regen, I can run a lower level Arctic Armour. I can also run Grace instead of Haste for increase defense.
Since 100% of my damage is lightning, the best offensive curse are either Elemental Weakness or Conductivity. Quality Elemental Weakness will reduce resistance by a larger % while Conductivity gives an extra 14% chance to shock and 20% shock duration. Usually, when I'm soloing, I use Conductivity. In party, I use Elemental Weakness.
Other utility skills
Arctic Armour: The insane mana regen of the build allows the character to use a high level Arctic Armour. I expect to be able to run level 20 Arctic Armour even though the gem is currently leveled to 18. At level 20, it provides a flat 189 physical and fire damage reduction. Very useful.
Devouring totem : Awesome tool to leech mana and life from corpses, especially with a build that don't shatter any corpse. At level 20, it leeches 299 life and 59 mana per corpse. Supported by faster casting, it can leech 636 life and 125 mana per second (as long as there are corpse to leech from). Impressive !
Molten Shell : Level 20 Molten Shell provides a flat 1058 armor. With my passives and determination, that means an extra 2860 armor. Too good to ignore. I support it with increased duration and faster casting so it takes only half a second to cast and last more than 20 seconds. As a bonus, If it explodes, it deals an average of 13,320 damage (with 70% chance to burn with quality). In the linked video, you can see how effective it can be against bosses.
With my current gear, Kaikua has around 4200 life. She also has a decent chance to block (32% against attacks) and pretty decent armor (11,788 with molten shell). Like mentionned earlier, she also the 189 flat damage reduction against fire and physical damage provided by Arctic Armour. In term of resists, the character has max elemental resists and -29% chaos resist. Passives provides +16% to fire and cold resist, +31% to lightning resist and +8% to chaos resist.
Link to the build's passives choices (at level 88):
Passives choices progression (Level 1 to level 88)
Bandit rewards (I underlined my choices)
Normal : 40 Life, or +1 Passive point.
Cruel : 4% faster casting or +1 Passive point.
Merciless : +1 power charge or +1 Passive point.
Gear and skills setup :
What kind of gear you should look for
With passives and gear that provides +170% to Armor, 148% to Energy shield and 0% to Evasion, Armor and Energy shield are naturally the first defense you should look for on gear. However, since Energy shield provides only mana with Eldritch Battery, you should focus on armor, unless you need more mana regen to cast your spells. To give you an idea, I have 2108 armor and 682 ES from gear and its working fine for me.
For your main hand weapon and shield, I highly suggest to pick a items that gives +spell damage, faster casting and crit chance with spells.
In addition, its important for survivability to have lots of +life on gear. The build provides +160% to life. It's ok but with that amount, you'll need life on almost every piece of gear to break the 4000 life barrier, which should be a priority.
How to deal with Elemental reflect ?
Against elemental reflect rares in non-reflect maps
When you encounter a rare with the elemental reflect mod, I suggest to switch do a 2nd set of weapons with a Saffell's Frame equipped. With the 8% additional block chance from the build + the Saffell, you'll have close to 41% chance to block your own spells reflected and when you fail, you'll have 80% lightning resist. So, you proceed to kill the rare with Storm Call. When he's dead, you can switch back do your normal weapon set. (you'll notice in the linked video that I didn't do that and it hurt)
For elemental reflect maps
In elemental reflect maps, I completely change my setup. I replace Arc by Firestorm. I replace Lightning penetration by Added Lightning damage. Since Firestorm deal many smaller hits, the Arctic Armour and maxed elemental resistance can absorb all or most of the damage reflected. For storm call, I replace lightning penetration with added chaos damage and its enough to use it safely. Finally, instead of conductivity, I use Elemental weakness. And Voila. Works really well.
Gameplay video 1 (Soloing a level 70 map. Dealing - not so well - with an elemental reflect rare)
I think I'm gonna use a Saffell's Frame to deal with them in the future !
Any comments, suggestions or questions are appreciated !