i've been playing a long time and dual wielding a long time too~ i still can't figure out how to predict when i will slash 4 times or 5/6 times when im using 2 daggers. i know if my fourth lands a crit the monster will be knocked back. however!! there have been many times too when the fourth is not a crit, but the monster is still knocked back. i don't remember if this applies to normal monsters but this happens a lot in the shadow realm. my unpreparedness leads to my own pwnage.
if anyone knows what causes me to stop at the fourth hit, could you please tell me?? im really curious. it would be nice to predict when i should press ice or def, instead of being caught off guard.