20fcr/3soc helm is usefull on throwbarb, cause it needs loads of ias.
Other than that u can run 1 x dual leech fcr ring and 2 hotos for 105fcr break on swap.
Arach can be used, but razor wrap and strings are both very good contenders...
If one are running guilaume instead, i dno which belt is best. Depends what u feel your missing, does not help to have better main hand fcr if that slows ur killspeed from razor wrap's Max dmg and pierce, and it does not help killspeed to die from lack of DR%, MDR and LL which strings gives you.