If you are fighting just one plain monster that gives-
1000 exp and 500 gold.
If you fight 2 of them at one time you get double exp
and gold plus half of the original value.
So if your fighting-
Artix and he gives 1000 exp and 500 gold,
but if you fight Artix (2) you get 2500 exp and 1250 gold
So keep in mind if you want to use the Admin menu fight
monsters in packs to get more gold and exp.