Found the problem. For some reason, server was not prioritizing conf/import/char_athena over conf/char_athena. Same for map_athena. Just deleted conf/import/char_athena and map_athena, and did the whole configuration directly at conf/char_athena and conf/map_athena.
Also, had to do the usual procedure of fowarding ports 6900, 6121 and 5121, adding subnet: 255.0.0.0:WANIP:WANIP to my subnet and adding my WANIP to data/clientinfo.xml of my friends.
joao's post in Online rathena server was marked as the answer