I gave up trying to reach the 1.25 swing speed with a soul glaive. I'm at 200 stam and 50 ssi. I run no ssi on my weapons.
This is my thrower:
i dont see a point for me to have 120 chiv, since i dont have 4/6 fc/fcr.
Also i throw at 1.25s all my pieces are stone, and i got 10 stam on every piece.
Before the SSI eppy came out, to reach 210+ stam i used jewels with 4 stam and M&S glasses. Used to run 10 ssi on both jewels.
Nowadays with the SSI eppys, i use the khal ankhur pendant, ozy apron and M&S glasses, and only n1 jewel with 10 ssi. Also not using cameo, cause i dont need the 5 SSI.
For weapons, all my weapons runs 30 SSI and 25 DI. i couldnt find a big reason to not have SSI or DI on weapons since it makes easier to put a suit together and to find good jewels.
For me, there is a sea of SSI for throwers, since u dont drop it from glaive.