Sage Chaos Blade Primal Upgrade or Nah?

Correct me if my facts are wrong from Ecatomb but I've heard both sides about which is better so I decided to play around a little bit. From the information I got this is what it comes down to.

Heart Shatter - "causing your Metal and Physical skills to deal an additional 50% damage to a non-player target for 10 minutes."
Mind Shatter - "increasing the Critical Rate of Wood and Water skills against a non-player target by 50% for 5 minutes."
Soul Shatter - "increasing the Critical Rate of Fire and Earth skills against a non-player target by 50%, and the damage by 150%, for 20 seconds."

I assume people leave non-upgraded because of the short 20 second duration of Soul Shatter for Fire and Earth DDs to spark kill a boss but that only works for Fire and Earth DD. Out of all three of these probably the weakest is Mind Shatter. Let's say I only use 10 water skills that do 10,000 damage each and I have a crit rate of 30%. Comparing the 3 scenarios would look like this:


No debuffs:
7 normal hits + 3 critical hits = 10 skills (average at 30% base crit)
(7 x 10,000) + (3 x 20,000) = 70,000 + 60,000 = 130,000 Water/Wood damage

Sage Mind Shatter:
2 normal hits + 8 critical hits = 10 skills (average of 30% base crit + 50% crit)
(2 x 10,000) + (8 x 20,000) = 20,000 + 160,000 = 180,000 Water/Wood damage

Sage Chaos Blade:
7 normal hits + 3 critical hits = 10 skills (average at 30% base crit + 50% amp)
(7 x 15,000) + (3 x 30,000) = 105,000 + 90,000 = 195,000 Water/Wood damage


So for Wood and Water DD the upgraded version should give more damage in a general sense but remember other debuffs like Cleric's Mark of Weakness, BM's HF, Sin's Subsea Strike, etc. can come into play and that I am making an assumption they have 30% crit rate.

It's obvious for Earth and Fire uses that Soul Shatter wins in the 20 second duration but loses in the long run compare to Chaos Blade which lasts 10 minutes.


No debuffs:
7 normal hits + 3 critical hits = 10 skills (average at 30% base crit)
(7 x 10,000) + (3 x 20,000) = 70,000 + 60,000 = 130,000 Fire/Earth damage

Sage Soul Shatter: 150% amp + 50% crit rate for Fire/Earth
2 normal hits + 8 critical hits = 10 skills (average of 30% base crit + 50% crit)
(2 x 25,000) + (8 x 50,000) = 50,000 + 400,000 = 450,000 Fire/Earth damage

Sage Chaos Blade: 50% amp for Fire/Earth
7 normal hits + 3 critical hits = 10 skills (average at 30% base crit + 50% amp)
(7 x 15,000) + (3 x 30,000) = 105,000 + 90,000 = 195,000 Fire/Earth damage


Clearly the damage output of Soul Shatter is more than twice as much as Chaos Blade but only lasts 20 seconds. So any Boss that survives longer than maybe 50 seconds maybe Chaos Blade would be better given the other debuffs are consistent of course (BM's HF, Subsea Strike). Obviously since most the debuffs are used together at the beginning, Soul Shatter really benefits Wizzies and Psychics the most in Spark killing.

And for Metal and Physical skills it doesn't make a difference at all.

I could look into Demon as well but Sage seems to be the better choice for Seekers.

Reference: http://asterpw.github.io/ecatomb/pwi-skill.html

PS. I may of made an error somewhere in here so please correct me if you see it. Obviously in this test there were certain assumptions I made such as 30% crit as the base off of the SB class crit. Mystics and Veno may have slightly lower crit due to differences in R9 gears (crit vs channeling addons). I also assumed there were no outside buffs either which is not the case in a real game scenario.

If everything is correct, I guess it really comes down to the squad's composition (do you have decent Fire/Earth DD over Wood/Water DD? Are you spark killing?). I still wanted to see what the majority of players like according to the demographic of classes they have on their servers and squads.