Wts the rapture wik fast casting

The Rapture (dropped from WiK White Mantel)
Energy +10
Chaos Dmg 11-22 r9 Fast Casting
Halves skill recharge of spells (Chance 20%)
Halves casting time of spells (Chance 10%)
Energy +5
Health +30

I have the following in game names.
Nocturnal Lunacy
Diamonds Amethyst
Wakinyan Oyate
Unchegi Oyate
Iktomi Oyate
Wrds Fall As Rain

Bump
Instead of just looking you can at least maybe tell me what it's worth.

Bump bounce ricochet etc

blump? blump bluuuuuuuuuuuuuump