Quick guide to know the ias needed!
use this formula:
(120*(EIAS - Skill Ias + WSM)) / (120 - (EIAS - SkillIAS +WSM)
how to apply the numbers:
Eias: the giant quote above has the eias and the fpa, for example to hit 9 fpa we need the eias 60!
Skill ias: aka Sias, skills that give %ias, in your case BoS or if you're wierd fana aura provided by beast ew
WSM: weapon speed modifier, every claw has one, check here
https://diablo-archive.fandom.com/wiki/Assassin_Katars_(Diablo_II)#Exceptional if you're using two claws (RC+LC)/2 = your average wsm
*with auto wsm you use this formula -> ((RC+LC)/2) + (RC - LC) = AWSM ie: GT+WF ((-30 + 10)/2) + (-30 - 10) = awsm of -50!
Now you can calc by yourself!
just for curiosity:
BoS lv36 (57 Skill ias) + Awsm of GT+WF (wsm -50)
(120*(EIAS - Skill Ias + WSM)) / (120 - (EIAS - SkillIAS +WSM)
(120*(129 - 57 + -50)) / (120 - (129 - 57 + -50)) = 26,93877... =
27% ias needed to achieve 6 fpa laying trap
(120*(167 - 57 + -50)) / (120 - (167 - 57 + -50)) =
120% ias needed to achieve 5 fpa laying trap
without BoS + wsm GT, RT or PB (wsm -30)
(120*(78 - 0 + -30)) / (120 - (78 - 0 + -30)) =
80% ias needed to achieve 8 fpa laying trap with 1 or 2 GTs/RTs or 1 PB (all this weapon would get -30 wsm) without BoS (so you can use fade)