by doing this item set your haste will be 26 and your stp will be 43
this only works if you wait 2 tics with regain earing and berserks torque to reach 100% tp.
this also only works if you ws in lancer body+rajas ring+sam sj+brutal earring
the first hit on stardiver with those in mind makes it 17.42, additional hits will be 1.3.
-----------------------------------
tl;dr
with haste26 and stp43 you can achieve a 4 hit after a ws with 17.29 and 2 tics from berserk/moonshade earring.
----------------------------------
math
13.3(gungnir) * 1.43(stp) = 19.019(result)
19(result) * 4(4 hits) = 76tp
76tp + 17.4(first hit of stardiver with rajas+lancerbody+brutal ear+sam sj) = 93.4tp
93.4tp + 1.3 + 1.3(two additional hits from stardiver) = 96tp
two tics from berserkers torque and regain earring = 100tp
---------------------------------
you may notice there is an arduba grip, keep in mind it is well worth the cost of pole grip when you have hasso+magic haste cap.
you may mix around your ws's stp however you want, just as long as you have at least 31stp when using it.
edit: maybe its better to use lancer's pelegrine instead of arbuda.