Matches fail, lighters run dry, ferro rods need skill. Redundancy is the whole game. Here is how the fire triangle should shape your kit.
Every fire needs three things: heat, fuel, and oxygen. Remove any one and the fire dies. Most people build kits with exactly one heat source — then it rains.
Primary — a plasma arc lighter. Works in wind, works in rain, no fuel to run out on a weekend trip, recharges from USB or sun. This is your everyday fire.
Secondary — a butane flame torch. One-handed ignition, strong concentrated flame, lights stoves and damp kindling instantly. When your primary is lost, wet, or frozen, this is the hammer.
Tertiary — primitive. Ferro rod in your pocket (never in the same bag as your other fire tools), char cloth, and the knowledge to use them. Redundancy means separate failure modes — two lighters in the same pack share the same failure: losing the pack.
Three ignition sources, staged fuel, and patience. That's the whole discipline.