Level 99 Hybrid Corrupting Fever Elementalist^3.27

Notes

Starting: This build is already t17 and uber viable if you know what you are doing but it is a little on the squishy side thanks to the unique chest we have to have for damage.  Swapped out to Diallas with a corruption there is alot for sale right now so id assume its okay. 
Reap = Green socket, Empower = Red Socket, make sure to follow the socket colors and order from pob for best results. Changed some gem links around to make damage more efficient. Will have to cast vuln on bosses now but clearing damage remains the same
In the Bossing setup you swap out your explode rings for herald of purity rings which are very cheap remember buff effect is the best stat here.  You will have to replace your topaz flask with res suffix

Step 1: First step is to try to get additional tankiness without sacrificing damage. We will craft a shield .  You get i86 titanium bases and you alt craft t1 energy shield % , t1 flat energy shield , t1 block chance and recombinate them. Remember to craft a low mod to lower dust cost.  
This method is called 2 + 2 = 3 where u can any of the 2 mods you want x 2 and recombinate them for 3 mods.  This will take you several tries.  I did it last night and took me about an hour of alts and 1 mil dust.   After that if you have 2 open suffixes you can apply a shapers exalted orb if not you have to use prefixes cannot change and scour.
If you do not get ES on block you have to do prefixes cannot change and reforge defense til you get it, there is about a 10% chance you hit full suffixes, if this happens you have to blind annul gl.  If you are poor you can skip the whole shaper section entirely til later as it isnt that important because your Energy shield is low(eventually you'll have to do it).

You are going to lose damage here so you will buy empower 4 and try to upgrade a few jewels so your damage remains roughly the same. The shield is rougly 22 divs to make, Jewels few divs empower 7.  31 to complete this step if you have normal RNG
On your tree you will remove one point from bottom left mastery and hopefully youve leveled by now to 97 and you can take a jewel slot for additional damage

 Step 2: In this step we will be crafting an amulet to give us big damage but we will lose some max res because of the flask setup.  We cannot use 4 flasks til a rare chest so this is the bandaid solution, you can also get res jewels if you want and use your topaz flask still.  
Get a focused amulet roughly around 30 divs at the moment and use Harvest reforege life til t1 life then annul the amulet til the mod is alone.
Then use Cannot roll attack mods and Harvest Augment phys.  This is a 50/50 to win.  If you end up with +2 phys and 250+ life craft min Frenzy Charges and catalyst life on you amulet.  On the flask section we change to bismuth flask and use a Fluid motion for dex and changing some of our crafts on gear.  On the 
tree you will remove Juggernaut and Endurance(if you didnt level again) and apply them to Discord Artisan for more dex and damage.    
This whole step will cost you 45-50 divs if your RNG is okay.

Step 3: This setup you will be grafting your wand for a Big dps upgrade.  Fractured 38 Physical damage overtime multiplier on a cast speed base wand. 
Use jagged metallic shuddering corroded fossil to get +1 to all spell gems.  From that point you want to get your wand to +1 spell gems 2 empty prefix,  the fractured mod and any suffix.   If youve annul'd off the random suffix you want to craft 3 crafted mods beefore you want to use cannot roll attack mods and use Augment physical. 
Craft 3 crafted mods, cast speed and minion damage.  If you leveled take your endurance charge back on your tree.  You will also recraft gloves here and the whole point of this step to improve your speed of your shield charge.
Get qualitied Warlock Gloves and Use insanity essence and try to fracture them.  Then use Dense fossils til desired energy shield.  Use eldritch currency on the bottom for Dex. 

Step 4: Grab the 2 mod foulborn respite and unity ring.  We are stacking some herald effect, we are adding herald of agony and redoing nodes on the tree.  We are adding herald clusters on the build instead of megalo maniacs to make the build cheaper here for most people. You will get 4 new jewels here to cap block.  You have the option
to use primordial eminence and anima stone for less block.  You can also do the mageblood swap before this and its also fine.

Step 5: switch to MB.  Redo flasks.  Get Forbidden jewels, you can use any of the shapers.