Is this a good bow?

Item Class: Bows
Rarity: Rare
Torment Barrage
Citadel Bow
--------
Bow
Physical Damage: 36-144
Elemental Damage: 113-237 (augmented), 104-216 (augmented), 19-324 (augmented)
Critical Strike Chance: 6.00%
Attacks per Second: 1.25
--------
Requirements:
Level: 58
Dex: 185
--------
Sockets: G-G-R
--------
Item Level: 73
--------
{ Prefix Modifier "Polar" (Tier: 3) — Damage, Elemental, Cold, Attack }
Adds 104(99-136) to 216(200-232) Cold Damage
{ Prefix Modifier "Blasting" (Tier: 3) — Damage, Elemental, Fire, Attack }
Adds 113(110-150) to 237(223-260) Fire Damage
{ Prefix Modifier "Shocking" (Tier: 4) — Damage, Elemental, Lightning, Attack }
Adds 19(14-20) to 324(281-327) Lightning Damage
{ Suffix Modifier "of Absorption" (Tier: 3) — Mana }
Gain 1 Mana per Enemy Killed
{ Suffix Modifier "of Venom" (Tier: 2) — Damage, Chaos, Attack, Ailment }
33(31-40)% increased Damage with Poison
25% chance to Poison on Hit
(Poison deals Chaos Damage over time, based on the base Physical and Chaos Damage of the Skill. Multiple instances of Poison stack)
--------

Anyone has any idea about this bow?

Not really.
The elemental dmg rolls aren't high enough, no attackspeed and the poison mod is useless with ele.
1 mana on kill is basically a dead stat too.