If we go with Option 2 (convert all databases to SQL) option 1 or 2, anything where there is more than 4 item/mob tables,
I vote for a 3rd database connection/config.
Then people can have 3 SQL databases setup like:
rAthena database (item, mob, mob_skill, pet, produce_db, etc..)
player data (all the tables currently in main.sql, except log tables)
logs database (all the tables currently in logs.sql, plus charlog and interlog)