This PoE 3.15 Ranger Toxic Rain Raider Starter Build has been tested for many leagues and is very suitable as your first starter build. Raider is pretty good ascendancy for toxic rain. We get a lot attack speed and movement speed from ascendancy.

 

Passive Tree & PoB

Path of Building Link: https://pastebin.com/03Gy9JHN


 

Gems Setup

Toxic Rain - Mirage Archer - Vicious Projectiles - Void Manipulation - Efficacy - Empower

Caustic Arrow - Efficacy - Vicious Projectiles - Void Manipulation - Concentrated Effect / Blood Rage

Wither - Spell Totem - Faster Casting - Multiple Totems

Dash - Second Wind - Withering Step / Summon Stone Golem

Summon Skitterbots / Malevolence / Immortal Call (Lvl 5) - Cast when Damage Taken (Lvl 3)

 

Endgame Gear Setup

Weapon

Quality does not increase Physical Damage
1% increased Attack Speed per 8% Quality
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+1 to Level of Socketed Gems
+1 to Level of Socketed Bow Gems
13% increased Attack Speed
+3 Life gained for each Enemy hit by Attacks
40% increased Projectile Speed
+35% to Chaos Damage over Time Multiplier

Quiver

27% increased Global Critical Strike Chance
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+15% to Damage over Time Multiplier with Attack Skills
+20% to Chaos Damage over Time Multiplier with Attack Skills

+78 to maximum Life
+2 Mana gained on Kill
35% increased Elemental Damage with Attack Skills
+172 to Armour and Evasion Rating

Helmet

Toxic Rain fires 1 additional Arrow
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+2 to Level of Socketed Minion Gems
+33 to Intelligence
+36 to Evasion Rating
+109 to maximum Life
+45% to Fire Resistance
+14% to Fire and Chaos Resistances

Gloves

+12% to Chaos Damage over Time Multiplier
+40 to Evasion Rating
+107 to maximum Life
12% increased Attack Speed

Boots

70% increased Mana Regeneration Rate if you've cast a Spell Recently
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39% increased Evasion Rating
+89 to maximum Life
+30% to Fire Resistance
+34% to Cold Resistance
+44% to Lightning Resistance
30% increased Movement Speed
16% increased Stun and Block Recovery

Belt

High life and res Stygian Vise belt with Searching Eye Jewel:

10% chance to Avoid being Shocked
3% increased Attack Speed
+34 to maximum Life
5% chance to gain Phasing for 4 seconds on Kill

Ring

Find high life, mana and res on ring

Amulet

+31 to Intelligence
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+423 to Accuracy Rating
+16 to maximum Mana
+13% to Cold Resistance
+26% to Lightning Resistance
+1 to Level of all Chaos Skill Gems
Non-Channelling Skills have -7 to Total Mana Cost

Allocates Corruption

Flask

Find Immunity to Freeze and Chill, Curses, Bleed Mod

Quicksilver Flask: Movement

Quartz Flask: #% chance to Dodge

Stibnite Flask

 

Anyway, for damage, we should find 'Damage over Time Multiplier', 'Chaos Damage over Time Multiplier'. Mana and Attack Speed mods also good for this build.

for defenses, we should find life, res, evasion