I made it 1300 last 2 weeks using FPC, plus one week 1200 since I had not much time.
But I always use half instead of mono since IMO they are not a good mono clan (lack Support cards).
Their staples include:
Chan (nice wall)
Fei (nice wall)
Kuei (suitable for nuclear)
Sauya (amazing atk manipulation, also scary for her high dmg)
Nakata (a must for Roots/GHEIST weeks)
Yumi (like sauya but more vulnerable to SOA, almost perfect if you just win a high pillz fight)