D&D traits by battle usefulness

Breath Weapon (FTOD Dragonborn)

Chromatic Warding (FTOB Chromatic Dragonborn)

Gem Flight (FTOB Chromatic Dragonborn)

Dwarven Toughness (Hill Dwarf)

Children of the Woods (EGtW Lotusden Halfling)

Fleet of Foot (Wood Elf)

Spellsmith (E:RftLW Mark of Making Human)

Finders Magic (E:RftLW Mark of Finding Half-Orc)

Drow Magic (Dark Elf)

Spells of the Mark (E:RftLW Mark of Shadow Elf)

Healing Touch (E:RftLW Mark of Healing Halfling)

Spells of the Mark (E:RftLW Mark of Hospitality Halfling)

Starlight Step (S:AiS Astral Elf)

Courier's Speed (E:RftLW Mark of Passage Human)

Guardian's Shield (E:RftLW Mark of Sentinel Human)

Half Elf Versatility (Half Elf)

Relentless Endurance (Half-Orc)

Savage Attacks (Half Orc)

Breath Weapon (Dragonborn)

Superior Darkvision (Dark Elf)

Drow weapon training (Dark Elf)

Cantrip (High Elf)

Elf Weapon Training (High Elf)

Mask of the Wild (Wood Elf)

Headwinds (E:RftLW Mark of Storm Half Elf)

Magical Passage (E:RftLW Mark of Passage Human)

Spells of the Mark (E:RftLW Mark of Healing Halfling)

Nimble (Halfling)

Spells of the Mark (E:RftLW Mark of Storm Half Elf)

Storm's Boon (E:RftLW Mark of Storm Half Elf)

Keldon Resilience (PS:D Keldon Human)

Dwarven Resilience (Dwarf)

Dwarven Armor Training (Mountain Dwarf)

Elf Weapon Training (Wood Elf)

Fey Ancestry (S:AiS Astral Elf)

Vigilant Guardian (E:RftLW Mark of Sentinel Human)

Natural Athlete (PS:D Keldon Human)

Spells of the Mark (E:RftLW Mark of Sentinel Human)

Intuitive Motion (E:RftLW Mark of Passage Human)

Stout Resilience (Stout Halfling)

Brave (Halfling)

Draconic Ancestry (Dragonborn)

Fey Ancestry (Elf)

Astral Trance (S:AiS Astral Elf)

Naturally Stealthy (Lightfoot Halfling)

Timberwalk (EGtW Lotusden Halfling)

Extra Language (High Elf)

Scribes Insight (E:RftLW Mark of Scribing Gnome)

Spells of the Mark (E:RftLW Mark of Scribing Gnome)