Fast Casting

From Guild Wars Wiki

Fast Casting is the primary attribute of Mesmers.

“

Fast Casting decreases the casting time of your Spells. Additionally, each rank in this attribute decreases your Signet activation times by 3%.

— In-game description

[edit] Inherent effect

Spells
Attribute rank	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
Casting time	100%	95%	91%	87%	83%	79%	76%	72%	69%	66%	63%	60%	57%	55%	52%	50%	48%	46%
Casting speed	100%	105%	110%	115%	120%	126%	132%	138%	145%	152%	159%	166%	174%	182%	191%	200%	209%	219%
Signets
Attribute rank	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
Activation time	100%	97%	94%	91%	88%	85%	82%	79%	76%	73%	70%	67%	64%	61%	58%	55%	52%	49%

All values are rounded to the nearest percentage point.

[edit] Notes

• Unlike the primary attributes of other professions (which have simple, linear progressions), the effects of Fast Casting on spells have an exponential progression.

• Experiments have determined that Fast Casting divides casting time of spells by 2^(Fast Casting/15) (or multiplies casting time by roughly 0.955^(Fast Casting)).

• In other words, each rank reduces casting time by approximately 4.73%. Note that this is multiplicative, rather than additive, so with 9 ranks of Fast Casting, casting time is reduced to roughly 66.1% (0.955^9) rather than roughly 57.4% (1 - 9*0.0473).

• Although percentages in the table above are rounded off to integral numbers, the game internally uses full precision for calculating fast casting modifiers and applying them to spell casting times. After the Fast Casting modifier is applied to the spell casting time, the final result is rounded up by the game to the next whole millisecond (thousandth of a second).

[edit] Fast Casting skills

Icon	Name	Description						Campaign
	Arcane Languor	Elite Hex Spell. (1...8...10 seconds.) Target foe's spells cause Exhaustion.	0	10	2	15		Factions
	Mantra of Recovery	Elite Stance. (5...17...20 seconds.) Your spells recharge 33% faster.	0	5	0	20		Core
	Persistence of Memory	Enchantment Spell. (5...17...20 seconds.) Your interrupted spells recharge instantly.	0	10	1	20		Nightfall
	Power Return	Spell. Interrupts a spell or chant. Interruption effect: target foe gains 10...6...5 Energy.	0	5	0.25 ¼	5		Factions
	Psychic Instability	Elite Spell. Interrupts an action. Causes knock-down if interrupted action was a spell. 50% failure chance unless Fast Casting 5 or higher.	0	5	0.25 ¼	10		Factions
	Stolen Speed	Elite Hex Spell. (5...17...20 seconds.) Target foe has +25% spell casting time. Spells you cast on target foe have -25% cast time.	0	5	1	3		Factions
	Symbolic Celerity	Enchantment Spell. (5...17...20 seconds.) Your signets activate 25...45...50% faster.	0	10	1	20		Nightfall
	Symbolic Posture	Stance. (5...17...20 seconds.) Your next signet recharges 20...68...80% faster.	0	10	0	20		Nightfall
	Symbols of Inspiration	Elite Skill. (1...25...31 seconds.) This skill becomes the Elite of target foe. Elite spells you cast use your Fast Casting attribute instead of their normal attributes.	0	5	1	15		Nightfall