Mayhem context is not a numeric rate table
2K's official Mayhem 2.0 overview says Mayhem increases challenge in exchange for better loot, and that dropped weapon stats improve as levels rise. It does not publish a universal per-level legendary multiplier, dedicated-drop table, variant pool, or universal numeric scaling formula. Those values are therefore not embedded here.
2K: Borderlands 3 Mayhem 2.0 overview
What the two probability inputs mean
The target drop chance is the probability that one complete attempt produces the item you are tracking. The desired variant chance is conditional on that drop. If the first chance is p and the conditional chance is v, the effective target probability is p × v. Leavev = 100% when any copy counts.
Probability and time formulas
For independent attempts, success within n cycles is 1 - (1-p)^n. Expected cycles for one target are 1/p; for k target copies the expectation is k/p. Expected time multiplies the latter by your full measured cycle time. None of these values guarantees an outcome.
Compare routes without smuggling in a rate
Save one URL per route using the same definition of “target.” A slower route wins only when its supported target probability rises enough to offset the extra combat, loading, travel, looting, and reset time. The related evidence-first farming guide gives a blank log schema.