Level 1 Kinetic Bolt Duelist^3.27

Notes

General recommendations:
In Keeper's League, we get a Breach in every zone in acts. They give a lot of exp and this guide will keep your damage so high that you should be able to overpower them easily.
You can skip breaches if you are more than 2 levels above the zone. Otherwise, take the Breaches. They are easy and keep you overleveled. 
If you are 2 levels under the zone you are in, do the Breaches no matter what. If you are too low level for the zone, you gain much less exp.
This is generally pretty cheap, but items like the Watcher's Eye (if you get both the Clarity AND the Precision mods on one item) might be more expensive than necessary. 
Some of the annoints are also not cheap, but they are for utility / speed.
The Timeclasp rings and Warped Timepiece amulet get expensive the closer to -20 you get. You don't need to maximize this unless you plan on continuing Kinetic Fusillade to red maps.



Level 1:
2x Blackheart gives flat Chaos damage to all attacks. You can use any attack skill that you want, but this guide focuses on wands because it is easy to start Kinetic Bolt from level 1.

Level 4:
You can equip Quicksilver Flasks now. Pre-making the quicksilver flasks helps a lot.
If you are crafting a quicksiver with the movement speed suffix, make sure the flask is at least item level 5. Level 5-7 gives us no risk of crafting something with a higher level requirement.
And you can add Volley and Pierce to your Kinetic Bolt.

Level 5:
Equip Karui Ward with the Graceful Assault annoint for speed and damage.

Level 8:
Equip new supports: 
Added Lightning Damage for raw damage since we don't have Poet's Pen yet.
Lesser Multiple Projectile for more coverage. Remove Momentum from link now. This is a quality of life support gem.
Added Cold Damage instead of Lesser Multiple Projectile if you just want damage over coverage.
Faster Attacks is just generally good.
Your 6 Link should look like this now:
Kinetic Bolt - Added Lightning Damage - Volley - Pierce - Faster Attacks - Lesser Multiple Projectile

Level 10:
Equip Clarity to enable Watcher's Eye jewel and to not need mana potions as often, if ever again.
Put Lightning Warp in a socket and lock it to level 1.


Level 12:
You can now equip two Poet's Pen wands. This gives free scaling physical damage to carry you to level 35. 
We also get auto casting Lightning Warps due to Poet's Pen's unique ability. Put Lightning Warp and Arcane Surge in one of your Poet's Pen wands.
Equip Honourhome for some flat lightning damage. Don't swap if you want to keep Goldrim's resistances.
Put Kinetic Fusillade in a socket and level it. Don't swap to it until level 25.
You can swap to a Karui Ward with the Fleetfoot annoint to speed up lightning warp, but Poet's Pen trigger on Lightning Warp is a little buggy so you don't need to. We will want this annoint swap at level 25 for speed.

Lightning Warp speed scales with reduced skill effect duration. The use speed is affected by cast speed. At level 25, the use speed of Lightning Warp increases substantially.

Level 18: 
add Faster Casting to your Lightning Warp link.
Replace Pierce with Sacred Wisps in your main 6 link.
Replace Added Lightning Damage with Physical to Lightning. You are scaling physical damage for free with Poet's Pen, so converting it to elemental damage.
Replace Lesser Multiple Projectiles with Elemental Damage with Attacks. The reduced damage from Lesser Multiple Projectiles will start to be felt around now, plus we are converting half of our physical to lightning.
You can pick up Herald of Ice or Herald of Thunder for more flat damage if you want, but mana can become a constraint if you are not close to a leech or mana on hit node.
You can add Blood Rage to your other Poet's Pen wand if you want.
You can also add Life Gain on Hit to your main 6 link if you want more healing. You can use this with Added Lightning Damage instad of Physical to Lightning and Elemental Damage with Attacks.


Level 25:
Swap Kinetic Bolt to Kinetic Fusillade.
You should have Window of Opportunity on your tree by now, allowing the duration of this skill to be around 0.25 with the two Timeclasp Rings. The rings need to be 17-20 reduced skill effect duration. 
On the trade site, it will be "#% Increased skill effect duration" and you set the max value to "-17". (-18 to -20 will feel the best, -17 is cheaper and works, but some people can feel the difference).
Now you can add Spellslinger to your Lightning warp link: Spellslinger - Lightning Warp - Faster Casting - Arcane Surge . Arcane surge is not necessary, but the speed can be felt by some people.
Swap to a Karui Ward with the Fleetfoot annoint to speed up lightning warp.
Swap to Prismweave for a lot of flat elemental damage.
Remove Faster Attacks from your 6 link. Attacking faster with Kinetic Fusillade does not benefit you until your duration is a lower number than your attack time.
Do not run a Silver Flask. Do not increase your attack speed.
You can now toggle Spellslinger when you do not want to teleport around while attacking.

Kinetic Fusillade functions with reduced skill effect duration. You use the skill, it stores projectiles, and once you stop attacking it releases these projectiles. 
If you get the duration low enough, you no longer have to wait for those projectiles to release.

Level 31:
The second biggest jump in damage/usage speed: Add Less Duration Support to your main 6 link. 
At this point, you should focus on life nodes on your passive tree. +30 Maximum Life and 15% increased maximum life if you do not have a life modifier in your body armor in the life masteries are both good.
An Unnatural Instict placed in the Scion start zone can help, but is not necessary.


Level 35:
The biggest jump in damage and what you will use all the way into maps.
Swap your wands to two Eclipse Solaris wands and swap to other Light Radius gear. Solaris Lorica, The Ignomon, and Bisco's Leash.
We get so much flat damage from Eclipse Solaris that the Prismweave is no longer that useful.
Add a level 1 Precision to enable the other mod on the Watcher's Eye. If you can't afford the Watcher's Eye, look for any form of Blind immunity to prevent your Light Radius from being reduced.
You should be able to path to some form of leech on the tree by this point. If you are a witch, shadow, or ranger, you can path to Clever Thief. Otherwise, Vitality Void / Spirit Void. 
Your 6 link should now be: 
Kinetic Fusillade - Elmental Damage with Attacks - Less Duration - Volley - Sacred Wisps . You can add some form of utility here for the 6th link. I would run Lesser Multiple Projectiles until level 38.

Level 38:
Swap Volley to Greater Volley. 
6th link options:
Fork for a bit more coverage. 
Life Gain on Hit for a bit more survivability. 
Kinetic Instability if you want more stuff on your screen.
Damage on Full Life for raw damage.

Add Mark on Hit to your Sniper's Mark.
You can add Haste if you want more speed, but make sure the duration on the Kinetic Fusillade tooltip is still a lower number than your attack time number.
You can add Purity of Elements if you want more survivability.


Level 50:
You can swap your Amulet to Warped Timepiece with the Hasty Demise annoint to increase your damage here, but it is not necessary. 
Your damage should be very high for this point in the game.