Well what I've noticed is there are a lot of basilisks from lvls 30-40.
and that their spines, claws and eyes each cell for a decent amount of silver(it adds up). So go to shimmering flats; farm spines and such also while getting xp . Then after a while, you will notice "hey im not gettin enough xp from these guys anymore . so head to strangle horn vale and you find more basilisks and tada lvl 40 with 90 gold.
Basilisk Farming FTW!