Just posting this for future reference and Googlers. (Hello, future Googlers!) I couldn't find a simple list of enemies with their Light Penetration weak points without having to search each individual page on the wiki, which is a hassle. Hopefully this can be helpful for others. All information is pulled from helldivers.wiki.gg.

TERMINIDS:

Alpha Commander/Brood Commander:

• Unarmored: Legs
• Light Armor: Everything else

Bile Spewer (Difficulty 1-5):

• Unarmored: Mouth, Butt
• Light Armor: Everything else

Bile Spewer (Difficulty 6+):

• Unarmored: Mouth, Butt
• Light Armor: Rear Legs

Bile Titan/Spore Burst Bile Titan:

• Unarmored: Inner Flesh, Upper Sac, Lower Sac
• Light Armor: Underside

Charger/Charger Behemoth/Rupture Charger:

• Unarmored: Inner Flesh, Butt
• Light Armor: Underside, Leg Flesh

Dragonroach:

• Unarmored: Wings, Thorax Sac, Abdomen Sac
• Light Armor: None

Hive Guard:

• Unarmored: Claws, Front Legs (only upper part), Rear Legs
• Light Armor: Body

Hive Lord:

• Unarmored: None
• Light Armor: Mouth, Inner Flesh

Impaler:

• Unarmored: Head, Tentacle Flesh, Inner Flesh, Leg Flesh
• Light Armor: Underside

Nursing Spewer:

• Unarmored: Mouth, Butt
• Light Armor: Everything else

Spore Charger:

• Unarmored: Inner Flesh, Butt, Spore Flesh
• Light Armor: Underside, Leg Flesh

Stalker/Predator Stalker:

• Unarmored: Everything except body armor
• Light Armor: Body armor

Rupture Warrior:

• Unarmored: Body, Legs
• Light Armor: None

Rupture Spewer:

• Unarmored: Mouth, Butt
• Light Armor: Body (small portion behind head), Spinal Plates, Rear Legs

All other bugs:

• Unarmored: Everything

AUTOMATONS:

Berserker:

• Unarmored: Everything except chest
• Light Armor: Chest

Devastator, Conflagration Devastator, Incendiary MG Devastator:

• Unarmored: Head, Arms, Stomach
• Light Armor: Shoulders, Pelvis, Legs

Heavy Devastator:

• Unarmored: Head, Arms, Stomach
• Light Armor: Shoulders, Pelvis, Legs, Backpack

Hulk Bruiser/Obliterator/Scorcher/Firebomber:

• Unarmored: Heatsink
• Light Armor: None

Marauder:

• Unarmored: Everything except torso
• Light Armor: Torso

MG Raider:

• Unarmored: Everything except backpack
• Light Armor: Backpack

Reinforced Scout Strider:

• Unarmored: None
• Light Armor: Rocket Rails, Rockets, Legs

Rocket Devastator:

• Unarmored: Head, Arms, Stomach, Rockets, Rocket Pods
• Light Armor: Shoulders, Legs,

Scout Strider:

• Unarmored: Pilot
• Light Armor: Legs

Jet Brigade Devastator:

• Unarmored: Head, Arms, Stomach,
• Light Armor: Shoulders, Pelvis, Legs, Jetpack

Pyro Trooper:

• Unarmored: Everything except fuel tanks
• Light Armor: Fuel tanks

Vox Engine:

• Unarmored: Fog Lights, Vents, Hatches,
• Light Armor: None

Agitator, Radical:

• Unarmored: Body, Head, Upper Arms,
• Light Armor: Everything Else

Brawler, Commissar, Rocket Raider, Trooper, Incendiary Rocket Raider:

• Unarmored: Everything

Assault Raider, Jet Brigade Commissar, Jet Brigade MG Raider, Jet Brigade Trooper:

• Unarmored: Everything except jetpack
• Light Armor: Jetpack

Annihilator Tank, Barrager Tank, Dropship, Factory Strider, Gunship, Shredder Tank, War Strider, Jet Brigade Hulk Bruiser/Scorcher:

• Unarmored: None
• Light Armor: None

ILLUMINATE:

Crescent Overseer:

• Unarmored: Torso, Arms, Legs
• Light Armor: Chest Armor, Crotch Armor, Limb Armor,

Elevated Overseer:

• Unarmored: Torso, Arms, Legs
• Light Armor: Everything else

Harvester:

• Unarmored: Carapace Weakspots, Shield
• Light Armor: Eye

Overseer:

• Unarmored: Torso, Arms, Legs
• Light Armor: Chest Armor, Crotch Armor, Limb Armor, Shield

Watcher:

• Unarmored: Everything except body and side fins
• Light Armor: Body, Side Fins

Gatekeeper:

• Unarmored: Rear Weakspot, Cockpit Weakspot,
• Light Armor: Shield, Pilot, Gun Weakspots

Veracitor:

• Unarmored: Internals, Cockpit Weakspot, Arm Weakspots
• Light Armor: Shield, Pilot, Shoulders, Upper Arms, Hips, Upper Legs

Fleshmob, Voteless, Obtruder:

• Unarmored: Everything

Illuminate Overship, Warp Ship:

• Unarmored: Shield
• Light Armor: None

Leviathan, Stingray:

• Unarmored: None
• Light Armor: None

As the title says, I'm wondering if there are benefits to different damage types that aren't explicitly stated or shown.

For example, explosion damage deals 100% durable damage. However, from what I've heard, it has a secondary benefit of causing enemies to investigate the explosion rather than the player when used while stealthed.

Just trying to make sure I'm not missing out on potentially interesting uses of different weapons.