PoE Frostbolt, Witch, Cold builds

I have pretty much everything I need to swap to LL except a belt. Crystal belts with 14% cooldown recovery seem to be absurdly expensive, so I'm trying to craft my own. I really only want a decent ES roll and 14%+ CDR on it (I'm already overcapped on res except chaos), and anything else is just gravy. Anyone have any idea how I would go about crafting this? I already have an ilvl 85 shaper crystal belt. I currently use Ice Nova of Frostbolts in my main CoC link and Frostbolt in my Cospri's. I see a fair amount of people using

Hello! This build is theory right now but is fairly cheap so I plan on building if I can get the dps higher. I don’t have the newest version of it, but I’m currently at 33m dps, going for ONLY damage. Need some help refining tree and choosing/swapping gear. Thanks in advance!

As the title says, I want a build that can one-shot legion. I came across this build, but I'm not sure if it's bait or not. Would this build be worth investing into, or should I look elsewhere? I assume it wouldn't make a big difference whether I have a mageblood or not.

Was thinking of cool interactions with the new returning projectiles support gem. Frostbolt ice nova came to mind because as the frostbolt bolts come back they would overlap and then cause the ice novas to overlap. I don't foresee this not working. But wouldn't be shocked if I missed something, I threw together a very quick minimal POB:

The reworked Ralakesh's Impatience boots make your minimum charges equal to your maximum charges when standing still. This got me thinking about the possibility of a charge stacker who only needs the stacks while standing still, for example when casting a spell. These boots should also interact in an interesting way with another unique, Malachais loop. This shield normaly removes all power charges upon reaching the maximum. However, this is not possible when your minimum charges is equal to your maximum, therefore the downside of this unique i