[3.14] The Invisible Witch | SRS MI Bomber

https://pastebin.com/ywtsKSVf

Wand #1:

Flame Dash (21/23) + Arcane Surge (5/0) | Dread Banner (20/0)

Make sure Dread Banner isn't linked to Flame Dash + Arcane Surge. Dread Banner is used for "Nearby Enemies have (15-21)% less Accuracy Rating", nothing else. Don't plant it, just turn it on.

Wand #2 (WIP):

Sigil of Power (21/23) | Cold Snap (21/23) | Vaal Grace

No links are needed. Cold Snap is a nice way to generate Frenzy charges. It's quite reliable for mapping and works on Minion kills too. Power of Sigil is additional reduction. It's situational though.

Helmet:

Summon Raging Spirit (21/23) + (Awakened) Unleash Support (21/0) + Predator (21/23) + Concentrated Effect (21/23)

Our main link. For pure mapping you can exchange Predator for Elemental Focus, but Predator is useful for encounters like Legion, Blight ... basically anywhere you need to target specific mobs. So I recommend this setup for everything.

Chest:

Raise Spectre (21/0) + Ice Bite Support (21/0) + Hypothermia Support (21/0) + Elemental Proliferation Support (21/23) + Added Cold Damage Support (21/23) + Chain Support (21/0)

Additional defensive layer, very strong for mapping. Unless you outrun projectiles from your Specters (you can with this build), they freeze everything around, even some bosses. Moreover, frozen enemies are shattered leaving no corpses.

Gloves:

Ball Lightning (1/0) + Hextouch (21/23) + Flammability (21/23) + Culling Strike (1/0)

Our main curse link. Ball Lightning has the best cast time of all similar skills, the projectile is slow enough, and it has nice default range. You will reliably curse whole packs with one cast. It also procs Elemental Equilibrium, just make sure you don't have a wand with added fire damage to spells. Culling Strike is optional.
Later you can exchange Hextouch for its awakened version (level 5!) and link two curses to Ball Lightning - Flammability and Elemental Weakness.

Boots:

Raise Zombie (21/0) + Feeding Frenzy (21/23) + Minion Life (21/23) | Summon Skitterbots (21/0)

Raise Zombie + Feeding Frenzy will give us 100% uptime on Feeding Frenzy. It buffs our Raging Spirits. Also we use Cluster Jewels with chance to taunt and knock back for zombies. It's a nice little defensive layer.
Remember we don't need Elemental Army support gem, because we have this debuff in our ascendancy and they don't stack.
Summon Skitterbots are debuffs that greatly enhance our DPS.

Ring:

Flesh and Stone (20/0)

We use Sand Stance!

After Act 10 / Before maps:

Wand #1: Any rare Wand with Minion Damage/Life or resists
Wand #2: Any rare Wand with Minion Damage/Life or resists
Helmet: Any rare Helmet with 4-link for Spectres
Body: Tabula Rasa or any Rare Chest with life and resists.
Boots: Any rare Boots with movement speed, life, and resists.
Gloves: Any rare Gloves with life and resists.
Amulet: Tavukai or Any rare Amulet with life and resists
Rings: Any rare Rings with life and resists.
Belt: Any rare Belt with life and resists.

Try to get evasion based gear, but if you don't have any good pieces then it's better to use gear that have more sockets and links.
If you don't have Tavukai then use Infernal Legion in a link with Raging Spirits.

Improvements during white and yellow maps in this order:

1) Any Tavukai. Extra points for negative chaos resistance (to make Raging Spirits pop faster).
2) Any Elder rare Helmet with both "Socketed gems are supported with Minion Life" and "Socketed gems are supported with Minion Damage".
3) Any rare Body armor with life and resists, or Kinstugi if it's cheap.
4) Atziri's Step boots.
5) Better rare Rings with T1/T2 life and resists
6) +1 Wands (+1 to All Fire skill gems are cheapest) with open prefix or suffix, so you can craft some minion damage or minion life.

Now you should be able to clear juicy red maps, Shaper, Elder, Sirus and all other content, albeit slower. Don't try Shaper with Maven yet.

Improvements during red maps in this order:

1) Tavukai with at least -15% to Chaos resistance, and the best Damage and Life rolls for Raging Spirits you can find. But don't spend too much currency on it.
2) Evasion based Elder Helmet with "+3 to Socketed Minion gems" and both "Socketed gems are supported with Minion Life" and "Socketed gems are supported with Minion Damage". It will cost few exalts, but it's worthy. Dump all your currency into this item and don't buy anything else until you can afford it.
3) Level 21 of Summon Raging Spirits gem. If there aren't any on the market, try to level one yourself. Quality is not that important, but it helps.
4) Stygian Wise with T1/T2 life roll and resists.
5) Better Cobalt Jewels and Ghastly Eye Jewels. They all should have +life rolls and minion life / damage rolls.

Frost Sentinels

They can be found in The Lunaris Concourse in Act 8. They are ranged mobs and they fire 2 projectiles. Chain support (+2 chain) and two spectres can hit 12 targets with 1 cast.
Their main goal is to freeze everything on the screen. Try it, it works :)
For (tough) boss fights you can exchange them for something else, but you would have to exchange the support gems as well. I just don't bother.