Uh ok never seen this on, there is no way to separate fact from fiction, or to sift out what exactly anyone means by "increased chances" Ive seen people use luck enhancers for vanities, as well as do bizarre things like use only fists, not use pots at all, wave at bosses when they are about to die, among other superstitions... so seeing through those things, and from multiple sources, these seem to be the best maps for vanities - dmc for delta, squatter/mining for numa, first map, venom-scorcher on sloucho, biosphere-pulse for SY (not enough data to be sure on the last one). The single best map for farming vanities is dmc as this gives both mechman and xrays, a lot, both of which fetch good prices and are rare.