Rengar vs Darius Counter Pick

Rengar’s 43.8% over 203 games tracked under patch 16.13.1 describes a clash he is not built to hold. His kit converts one burst—Unseen Predator turning an attack from brush into a leap, Savagery with Ferocity spent, Bola Strike to root—into a kill before the target answers. Darius simply has the health bar to refuse that.

• Hemorrhage stacks bleed up to five times and enrages him as it builds, so every additional second spent in melee range works against the assassin.
• Noxian Guillotine deals true damage scaled to those stacks, ignoring the 34 base armor and 105.4 at level 18 that Rengar relies on.
• Apprehend passively ignores a share of the target’s armor and actively sweeps enemies inward, cancelling the exit that the camouflage on Thrill of the Hunt would otherwise provide.
• Darius finishes at 2,590 health and 125.4 armor by level 18 while Rengar stops at 2,358 and 105.4, so a trade that looks even on full builds is not.

The edges Rengar keeps are 68 base attack damage against 64, 345 movement speed against 340, and 125 attack range that forces Darius to connect with the weaker handle of Decimate. Battle Roar at full Ferocity also breaks crowd control, which is the direct answer to the slow on Crippling Strike. Difficulty ratings of 8 and 2 favor the simpler kit here—the skirmish is winnable, but only with disciplined Ferocity management against a target already damaged.