I had lower scores last week aswell just over 20K this week its a bit better around 35k on performance, this on MultilangRom..tried Singapore and Malaysian and it perfermed better not only on Antutu, but the whole device was snapier.
I dont like Multilang is based on Developers Firmware, please take Stock Sgp or Mal. stables to begin with..Both SGP and Malaysian are designed with integration of playstore etc..English is already way better in those roms than Chinese Firmware.
Offcourse benchmarks arent all that important but its annoying seeing your device acting diffrently every week or so. I mean even RedmiNote scored higher on antutu than what i hit last week! why probably because its on a stable rom not on dev edition. Also both Multi lang for Hongmi1S and remi note are based on stable release, why not a stable based for mi3w as well?