Adena drops have been lowered server-wide, not only in 86+ hunting zones. In Fields of Massacre (lvl 55 zone), mobs now drop 300-400 adena. And in Catacomb of the Witch (71-75 lvl) adena per mob is maximum 900. This isn't viable by any means.
Also, Elemental Zones drop ZERO L2 Coins. The reduced daily amount is irrelevant here.