Sapper

Sapper is a Human in Abiotic Factor (codename Order: Saboter). It has 400 torso HP and 240 head HP. Its melee attack hits for 95 Blunt damage.

Among the 33 Human enemies tracked here it ranks #11 by torso health — above average in health.

No elemental weakness is recorded for it, so a high-damage weapon of any type is the straightforward answer.

It resists Explosive,Laser damage, so avoid leaning on those types even if your best weapon uses one.

Watch for its special attack, "Kamikaze" (1200 damage) — break line of sight or dodge rather than trading hits through it.

Harvestable from it: Bio Scrap, Human Skull, Human Arm (Military), Sapper Suit. Bring the tools to collect these or you lose the drop.

Verdict: Overall Sapper is a Human in the upper half for toughness.