Can you use Finish Attack to drop bubbles when above 50%? Or is the animation too long to be worth it?
I have thought of using FA EX at first 50% HP Bar as well, since Side Dodge can no longer be used to reduce CD in the latest KDN update.
However, the DPS of FA EX is not that outstanding as compared to other Skills (such as Front Shove, Evasion Slash & Parry) at first 50% HP. In addition, the animation is a bit long. Meaning, after you successfully cast a FA EX, the exact amount of time could be better used in doing Parry + Evasion Slash + Front Shove, as the latter does much higher damage at first 50% HP. Thus, the amount of time & effort spent in using FA EX for CD Reduction Mechanism may not worth it.
Nevertheless, I twisted the Skill Rotation a bit, and come out with a new strategy.
LD + Dash Kick + LD + Finish Attack + Immediately Cancel with Evasion Slash + Front Shove + Brave + Side Kick
As we can see here, the CD of LD is reduced from 10s to 5s.
In order to save time here, I cancelled FA EX immediately with Evasion Slash, and max Bubbles by using Front Shove + Brave. (In fact, you can use other Skills such as Parry/Triple Slash with Brave to max Bubbles as well, I just took Front Shove as an example only). In this case, while applying CD Reduction Mechanism, we NEVER compromise DPS as Evasion Slash/Front Shove are pretty decent in dealing the damage, in the process of maximizing Bubbles. This method is like "Force Use" of CD Reduction Mechanism.
Just saying, what I have mentioned above are theories only. If we want to apply it into the Pratical Situation, we need to think of the both pros and cons. we will ask questions like: How much will be the increase in DPS if we use FA EX for CD Reduction Mechanism at first 50%, does it worth the effort? Is this method comfortable to use, will it affect the flow of the game play if we force apply it? There are quite some factors to consider and I am not really sure of them.
Just like what you have mentioned, there are too much stuff to remember and it may cause a burden in the actual gameplay. Besides those really HardCore Players who want to like 100% mazimize their DPS output (NOT me), for the majority of the Players, I believe just relax and be comfotable with the gameplay is more than sufficient already.