according to d2planner i should have the fastest possible kicks with dragon tail

im wearing 2x mosaic in greater talons
20% ias gloves
and hellwardens will with 20% ias

the planner says i have 7 fpa - even with fade
but when i activate burst of speed my kicks are A LOT faster for some reason

Have you added bos to d2planner also ?

no - im using fade

WSM: -30
IAS: 60
Skill IAS: 0 (fade)

EIAS = FLOOR(120*Ias/(120+Ias)+SkillIas-WSM;1)
EIAS = FLOOR(120*60/(120+60)+0-(-30);1) = 70

FPA DRAGON TAIL:
=CEILING(13*256/FLOOR(256*(100+EIAS)/100;1);1)-1
=CEILING(13*256/FLOOR(256*(100+70)/100;1);1)-1 = 7 FPA

1 second is 25 frames.
25/7 = 3,57 attacks per second.

Might count as 2 hits per attack(Initial damage and explotion?)
Knockback might be slighly delayed and visuall make it look like your attacking faster.
Lags?
Sometimes visual animations is not aligned with real attackspeed.

Any fana from merc? Any Bos usage? Metamorhposis with mark of the bear?

Also the action frame will hit aboutly mid attack... So this may confuse visuals.
I would assume base action frame to be ROUNDOWN(13/2) = 6
Actionframe = CEILING(6*256/FLOOR(256*(100+70)/100;1);1)-1 = 3

But actually, when i check the number its seems that action frame for kicks are 4. (Faster than normal)
Also, action frame does not have the -1 in the end... That is a smoothening feature used in the full animation, so action frame should be:
=CEILING(4*256/FLOOR(256*(100+70)/100;1);1) = 3

So your hits should land at theese frames:
3 - 10 - 17 - 24 etc

Which basicly means that you are able to land 4 hits the first second. As first hit gets the benifit from action frame.

This post was edited by gel87 on Mar 17 2026 03:26am

here is what i am seing - there is a massive visual and damage-wise difference

I see, you mean that bos push it faster than 7 fpa.

That is a new discovery i guess. That means that EIAS cap is not 75 for this skill.
Which means:
90 Eias = 6fpa
117 Eias = 5fpa
161 EIAS = 4fpa
226 EIAS = 3fpa

Dno where its capped or not though. Should also be tested on Dtalon.

Btw, this is quite interesting.
What is ur bos level?
I can calc for you what ias increase you need to test next EIAS value

in the video it was lvl 8

i respecced, its now lvl 31

This post was edited by Jackalkix on Mar 17 2026 07:18am

Okay.

So you had lvl 8 = 43 skill ias. Which bumped EIAS from 70 to 113, meaning you where just 4 shy of the 5 fpa breakpoint.
So ur lvl 8 bos was 6 fpa, ur none bos was 7 fpa.
Now with lvl 31 bos, that adds 56 skill ias. Which means ur EIAS is then: 126. Which should bump it to the 5 fpa frame which starts at 117 EIAS.
To reach 4 fpa you need to increase either bos or ias.
With lvl 31 bos you actually need excactly 200 ias to reach 4 fpa.

A easier test would be a fanatism merc.
Lvl 15 fana = 33 skill ias.
Lvl 31 bos + lvl 15 fana = 33+56 = 89 skill ias.
With 89 skill ias you only need 65 ias to reach 161 EIAS which is the 4fpa break.

Want to know the serial speed for dragon talon?

Incase you want to calc it urself and try out some(excel formula) :
EIAS =FLOOR(120*IAS/(120+IAS)+SkillIas-WSM-SLOW;1)
FANA SKILL IAS =MIN(10 + (FLOOR(30 * ( (110*Slvl) / (Slvl+6) ) / 100;1)); 40)
BOS SKILL IAS =MIN(15 + (FLOOR(45 * ( (110*Slvl) / (Slvl+6) ) / 100;1)); 60)
Kick FPA =CEILING(13*256/FLOOR(256*(100+EIAS)/100;1);1)-1
SerialKick FPA =CEILING(4*256/FLOOR(256*(100+EIAS)/100;1);1)

Metamorphosis mark of the bear is another way of adding another 25 skill ias. Selfwielding beast is a way too(but highest will overwrite).
Kick FPA = the one for dragon tail, also for the last kick of the DT serie.
SerialKick FPA = The fast ones in dragon talon.

Inputs are ofc:
Ias
Skill Ias
WSM
Slow
Fana lvl
Bos lvl

This post was edited by gel87 on Mar 17 2026 07:32am

i only have a faith with lvl 12 fana aura - how much ias would i need then?
with lvl 32 BOS