My personal experience: I first use hide and then dark illusion into double attack and then duel stab. This combo should theoretically give me 4 combos based on the description of the skills but instead I only get 2 combo. If I use hide>dark illusion>duel stab> double attack, I get 4 combos. Both combo should give the same about of combos.
I have also tried double attack> duel stab and double attack>doubleattack>duel stab. The end result, no combo stacks coming from duel stab
EDIT: actually it seems to be that if you use chain your skills too quickly, combos will not register
Edited by Melancholyx3, 04 May 2013 - 09:12 AM.