What about Hand of Blessed Light?
It gives more +skill and the base speed is - 10 as well. I imagine this could be a go too as well - just with crushing blow from 1 Ber via socket.
Helmet could be gulllys ias/@ to make up for the smite part
It doesn’t give more +skills
Compared it to Astreon in my example:
Both give +4 foh / smite / holy shield
Both have -10 WSM
Aestron has an extra 10 ias, reaching max speed from only gloves
Aestron gets 53% CB vs 20% on heavens+ber
Aestron gives +85 dmg to your base shield dmg (mini grief lol)
Heaven’s +dmg is min & max dmg, this is not applied to your shield like grief/astreon
As you may have noticed already, foh is great, it’s your main skill.
So if you drop whatever helm for guillaume’s instead, you lower your main dmg.
I really wouldn’t do that.
I feel like the build I linked is the perfect balance of a nearly maxed foh dmg on a 75fcr setup, with still very good smite dmg and 78% CB without sacrificing any foh dmg.