I believe dagger throwers are the best builds to take advantage of imbues. Their high doubleshot gives them an effective attack rate that beats xbows.
The xbow builds will also eventually run out of NHB charges while dagger throwers have no charges. Since it is alchemist based it can spam doubleshot boost in conjunction with their burst abilities, all quest/raid long. Giving it another advantage that is unique to alchemist throwers.
This build gets 35~ dice on an effective base attack rate of 3.6~. That can boost to 4.76. 5.76 if you wanted to flex
The build : 15alch/3rgr/2rog drow.
Feats :

AP :

Gear :
Googles: Legendary Lenses of the Dark Depths (Ins Dodge, UMD, Blindness Immunity) Profane Experiment 1
Helm: Watcher helm (Ins DS, Accuracy, Q Deadly, Seeker) Perfect Silence 1
Neck: Legendary Pendant of the Sky (Insight Negative/Devotion, Deception) Curse 1
Trinket: Legendary Gem of Many Facets (Insightful PRR ) Silver Concord set Concord 1
Cloak: Cloak of the Hunter (Relentless Fury, Exc Healing Amp, Q Deception, Q Seeker 3) Perfect Silence 2
Belt: Dinosaur Bone Belt (Int 15, Deadly, Armor Piercing) Curse 2
Gloves: Legendary Birchlore Curse 3
Boots: Legendary Spectre Boots (Doubleshot, Ghostly) Profane Experiment 2
Bracers: Legendary Sunken Chains (Insight Seeker, Q Int +3) Perfect Silence 3
Ring: Legendary Signet Ring of the Sky (Negative 149, Positive 149) Curse 4
Ring: Legendary Ring of the Silver Concord Concord 2
Armor: Legendary Researcher's Leathers (Healing Amp, Fort, PRR, False Life) Profane Experiment 3
Weapon: Attuned Bone Throwing Dagger (Icescale, Meltfang, +2 Exc Int, Ash) Curse 5
Offhand: Simple Dino Attuned Weapon/Dino Orb if optimal party covers your debuffs
Quiver: Epic Quiver of Alacrity (Insight Deception)
Insightful Sheltering Set up :
Googles: Legendary Lenses of the Dark Depths (Ins Dodge, UMD, Blindness Immunity) Profane Experiment 1
Helm: Watcher helm (Ins DS, Accuracy, Q Deadly, Seeker) Perfect Silence 1
Neck: Legendary Pendant of the Sky (Insight Negative/Devotion, Deception) Curse 1
Trinket: Legendary Gem of Many Facets (Positive Lore/Armor Pierce/Insightful Accuracy ) Silver Concord set Concord 1
Cloak: Cloak of the Hunter (Relentless Fury, Exc Healing Amp, Q Deception, Q Seeker 3)
Belt: Direbear Belt (Insightful Sheltering) Perfect Silence 2
Gloves: Dinosaur Bone Gloves (Int 15, Deadly, MRR, Fossilized Amber) Curse 2
Boots: Legendary Spectre Boots (Doubleshot, Ghostly) Profane Experiment 2
Bracers: Legendary Sunken Chains (Insight Seeker, Q Int +3) Perfect Silence 3
Ring: Legendary Signet Ring of the Sky (Negative 149, Positive 149) Curse 3
Ring: Legendary Ring of the Silver Concord Concord 2
Armor: Legendary Researcher's Leathers (Healing Amp, Fort, PRR, False Life) Profane Experiment 3
Weapon: Attuned Bone Throwing Dagger (Icescale, Meltfang, +2 Exc Int, Ash) Curse 4
Offhand: Simple Dino Attuned Weapon/Dino Orb if optimal party covers your debuffs Curse 5
Quiver: Epic Quiver of Alacrity (Insight Deception)
For you lottery winners out there.
Starless Night + Concord dual Gem of Many Facets :
Googles: Legendary Lenses of the Dark Depths (Ins Dodge, UMD, Blindness Immunity) Profane Experiment 1
Helm: Watcher helm (Ins DS, Accuracy, Q Deadly, Seeker) Perfect Silence 1
Neck: Legendary Pendant of the Sky (Insight Negative/Devotion, Deception) Curse 1
Trinket: Legendary Gem of Many Facets (Healing Lore, Armor Peircing , Insightful Accuracy ) Silver Concord set Concord 1-Starless 1
Cloak: Cloak of the Hunter (Relentless Fury, Exc Healing Amp, Q Deception, Q Seeker 3) Perfect Silence 2
Belt: Lindal's Mighty Belt (Insightful Sheltering +19) Curse 2
Gloves: Legendary Bramble-Casters (Poison +151) Starless 2
Boots: Legendary Spectre Boots (Doubleshot, Ghostly) Profane Experiment 2
Bracers: Legendary Sunken Chains (Insight Seeker, Q Int +3) Perfect Silence 3
Ring: Dinosaur Bone (Int 15, Deadly, MRR, Fossilized Amber) Curse 3
Ring: Legendary Ring of the Silver Concord Concord 2
Armor: Legendary Researcher's Leathers (Healing Amp, Fort, PRR, False Life) Profane Experiment 3
Weapon: Attuned Bone Throwing Dagger (Icescale, Meltfang, +2 Exc Int, Ash) Curse 4
Offhand: Simple Dino Attuned Weapon/Dino Orb Curse 5
Quiver: Epic Quiver of Alacrity (Insight Deception)
Filigree :
artifact ; spines raid 10rp/Eye Beholder-Grave +2 int-8usp/Long shadow +1 int/Crackshot 5rp
weapon
spines raid 10rp
spines 5rp
spines atk-dmg
set : 2 dmg/10rp
total : 35 rp/3dmg
long int
long 5rp
set : 5rp/2 dice
total : 15rp/1 int/2 dice
reverberation 10 universal sp
reverberation 3prr/2mrr
set : 2 dice
total : 1ousp/3prr/2mrr/2 dice
Eye Beholder-Grave +2 int/8usp
set : 10usp
total; 4 int/26 usp
Crackshot 5rp
Crackshot atk-dmg
Set : 15 rp
total : 25rp/1 atk-dmg
imbue breakdown :
5 alch 15 levels
1 vile chemist ap
2 drow ap
4 aa ap
3 asi ap
3 gear set
1 augment
1 element feat
2 chaos feat
3 scion feat
3 draconic
2 greater elemental
4 filigree
34 dice