Level and EXP cover the map's ordinary spawns only — MVP bosses and script-summoned monsters are excluded, since they would skew both the range and the average. Average is per kill, weighted by how many of each monster spawn; the pool is every monster on the map added together.
Drops bound to this map rather than to a monster, at the fixed rate the server defines. These are not affected by the server drop rates. A 3% gold rate means equipment and card drop bonuses apply to it; a 3% grey rate is fixed. A rate carrying ×3 is listed three times on this map and is therefore rolled three times.