So, had a quick look at the rogue build calculator...
You need to get to 100% chilled to proc Frozen.
Frost Caltrops lasts for 6 seconds and does 20% chilled per second.
Frost Imbue at 5/5 rank does 35% chilled and has 2 charges. Also gives you 20% more damage to CC and 40% more to Frozen.
The frost passives will give you 15% more damage vs chilled and 30% more slow so keep them in the caltrops longer.
So, we're up to a flat 55% more damage vs Frozen if you cast Frost Imbue early enough that it's ready to instantly recast in battle. But even just 15% more vs chilled and 30% more vs frozen is pretty nice.
The thing is, rapid fire isn't going to freeze a big pack...
So, maybe this is where Rain of Arrows shines since imbuement effects have 20% increased potency and it hits TWO times and is the only imbueable ultimate and best AOE to dish out chilled..
So, that's 42% chilled per wave from RoA, up to 84% chilled... Enough for caltrops to instantly freeze or Rapid fire if there's a spare imbue charge.
They did also show a legendary item that adds all 3 imbue to Rain of Arrows, so you might not even have to waste a charge on it, eventually.
Plus, caltrops does raise damage 3% a second... Potentially 18% more damage. So, we're up to 73% bonus damage, best case scenario.
That's actually pretty good.
Heartseeker, rapid fire, caltrops, concealment, frost imbue, rain of arrows?
I mean, poison you're waiting around forever for the damage to kill them. Dark you rely on them dying to explode or it just does damage to the main target when it expires without AOE. Frost you're looking at 15% flat damage minimum up to over 70%
Might be the overlooked spec? Or maybe its just the bow spec because slow is only really important if you want to keep your distance?
Also, I'm thinking if you can do a 100% crit frost rain of arrows using concealment against frozen enemies that's going to do insane damage.
Ps.
https://d4builds.link/RTNVd0 that's what I'm looking at, still 22 points spare. Any idea how to finish the build off?
edit: I'm not even thinking clearly! A frost Rapid Fire will do 15% from the passive and 20% from the upgrade so 35% flat damage bonus compared to poisons dot or darks on death effect. I think I like the sound of that more.