It's true that the evilheads are interesting for a gold rush (^^) but I think the most valuable foes are located on Motavia !
Go to the south from Uzo or to the west from uzo and nortwest from casba : then go to the south part of the lake (between the mountain range to the west and a field of ant lions to the east...and the lake to the north (and sand to the south
)
and try to hunt some
SANDWORMS/(I don't know how to translate lol) : 82 in HP, not really hard to beat...and 129 mesetas each : don't know how many you can have at the maximum but I don't think more than 4 : it's even a great ratio !!
And if you are lucky...you will even "fall" on BARBARIANS/Motavian Mania (don't know if it's a good translation !;) ) ! 54 HP, not too hard to beat too and 89 mesetas ..and you can have up to 8 of them at the same time !!!
If it's the case...712 mesetas ! It's not happening everytime but even 4 of them is really interesting...
And they appear often near the sandworms so..
All aboard and go to Motavia's lake !;)