By the by, the two identical rooms puzzle gives you the answer straight up, if you interpret it right.

Read the spoiler if you give up on solving the twin rooms puzzle and want an almost solution:
Without giving away the actual solution, do the following: Note which lever you pull in one room and what element it shoots in its mirror room. Then follow the pattern of what "defeats" what element (i.e. water extinguishes fire, lighting electrifies a water surface)

Also, if you pull the right lever, a the smoke on top of the corresponding pillar in the other room will turn to fire.

Unless otherwise specified, just an opinion or simple curiosity.