Having played both the Pathfinder and the Berserker Version over the last 2 leagues, some input:
20% Increased Flask Effect with a Alchemist's Quicksilver of Adrenaline is 15% Movement Speed, also an additional Projectile (not too relevant but still) and 6% AOE from Dying Sun.
Didn't hear you talk about that, only heard you talking about the faster Mana you gain, which is actuall irellevant unless you dont attack and wait till your mana fills up(as opposed to the 15% movement speed and 6% Aoe, which you failed to mention, which are relevant)
With Cyclone, you attack so fast, you usually proc the Cooldown of CWDT (250 ms) every time anyways, saying that you built it correctly (Bitterdream with Socketed Weapon Ele Corruption), so that the 10% more damage taken actually do not matter for your dps. (It matters with Shield Charge i guess, but to that later)
Also, the leech from Berserker is useless.
So what it really comes down to, comparing Berserker and Pathfinder is:
Pathfinder:
30% movement speed 15% Attack Speed
Being able to do T16 and T15 Bosses aka Flask stuff (Depends on what you want to do with the build, but with Cyclone and Pathfinder, its eas as fuck, whereas you can Portal out 4 times for Flask Charges with Berserker and hope you don't get killed in between.
40% Inc Dmg Bleed immunity Status Aliment Immunity (aka being able to get stuff like more Adrenaline rolls on Flasks)
vs
40% more damage 62% Attack Speed 50% inc Dmg Wondering how the hell you get Bleed Immunity on a Flask Wondering why you don't get to Level 95 while being frozen every 50th map and losing Exp
If you want to do T11-T13s all day, it actually does not matter, because the damage will be irrelevant and the lost Attack Speed on Pathfinder will be made up by the massive Movement speed Bonus (30% from Tree and not needing Freeze/Bleed Immunity on Flasks, which is huge, since you won't have space for any)
As for Shield Charge, once again, i think its perfectly viable for T11-13 and yes, it's faster, but if you go higher in Tiers, procing stuff only every 2cnd Shield Charge is just inconvenient and won't do enough damage. Also, i find it funny that you say "Wow 10% More damage taken so i can run Level 17 Spells in my CWDT-Setup, while i am sitting on almost all Level 21 Gems with Cyclone and Corrupted Bitterdream and 7 Fevered Minds, having 0 problem proccing them like crazy. (Because Cyclone Drains Mana like a Madman, unlike Shield Charge)
Nothing in your video convinced me, not even the Deadly Shaped Strand Map you ran! Now please elaborate exactly where Berserker is superior to Pathfinder again to me, because after playing the build for almost half a year i have a completely different opinion.