These came out with Ashes of Malmouth and the often used crafted armor pieces, like Stoneplate Greaves and Intrepid Warboots.
They are only useable after level 90 and so they instantly (try to) compete with high level MIs and the more common legendaries.
I see them as very accessible, but really they are often no more accessible than regular MIs, but have substantially worse stats.
Bloodspill Cleaver
Like Pitmaster’s Axe, but without the CDR for Ring of Steel. Keeping RoS as pierce is cool, but without CDR it seems unusable.
Deathborne Scepter
This actually has a cool bonus.
But sacrificing a weapon slot for sth that doesn’t add CDR to Bone Harvest doesn’t seem to be popular.
Rime-Rotten Wand
This is a worse Venomlash. I’ve tried this one and blew millions of bits to craft double rare versions. Ended up with Plaguebearer’s of the Venomclaw, which is pretty insane.
But the slow attack speed kills it. A double rare is just straight up worse than a pretty mediocre legendary.
Stormsurge Pistol
Seems like a missed opportunity to have a 1-H ranged option for elemental Savagery. Or even 1-H ranged Primal Strike.
If anyone has used this for the extra Wind Devil before, I’d love to hear it.
Stonewall Defender
In theory you could craft a nice shield with this base.
But the market for physical Ill Omen doesn’t seem to have many buyers.
Casting a spell on a character, who doesn’t scale cast speed, is really not great, so using this for the 15% phys RR alone is a little questionable. Which leaves spellcasters, who often need the off-hand just for conversion.
Maybe this is just waiting for the right build to come along.
Smoldering Tome
Zarthuzellan’s Codex and Subjugated Wraith exist.
Having this for “Chaos BWC”, when it adds a DoT seems odd.
If anything, Subjugated Wraith should have the extra DoT and Smoldering should have the higher flat.
Spellshock Tome
Recently got damage reduction to AAR, but competes directly with the life leech on Pulsing Shard.
Maybe having a conversion option would create a niche for this.
Gutcrush Warmaul
For a bleed build, there’s not really a reason to take a big, physical 2-H hammer over a sword and shield. So using this over Scorpius Bludgeon and Kalis’Ka’s Harvest doesn’t seem to have any upsides.
And Guillotine also exists.
I think to make bleed work, it would need more than 1 skill mod, so you can utilize CD Blade Arc with default attacks or Blitz (and having bleed mods for those).
Flamewarder Rifle
Fire/physical themed weapon.
Fire already has Ugdenbog Flamethrower, Fire/Physical has Mythical Adversary.
It would be more interesting if it was Fire/Lightning themed, so you could use it with either the normal transmuter or Vilgazor’s Heart
Nimble Crest
Watcher Crest
Throwing these in here.
I once tried to craft some as a filler option, but 3 Aether Crystals per craft gets super expensive and they don’t really roll well.
The base stats are not overly exiting, when we consider how competitive the medal slot has become.
(not all care about lifesteal on pulsing shard for some weird reason 
