Fix Blader 120

Ever since i updated from 110 to static 120 13D db, i noticed that double stab from blader barely works, if you are lucky you get 3 hits in, REALLY lucky, all 4 hits, but most of the time it's just the 2 hits from Mad Dragon Blade, but then it won't execute Heavenly Blade...

Before with 110 cap db it worked flawless 98% chance of getting 4 hits in, now it's down to 0.5%

Ofc i know that most of this is due to little lag, but somehow it feels like it's not optimized...
Because otherwise the 110 would had problems aswell..

Is there anything that can be done to fix this serverwise?

Video showcasing: sro_client 2012-04-09 10-15-40-93_x264.avi - YouTube