- Sextant of Unstable Currents
- Item Level 128
- Binds when picked up
- Unique
- Trinket
- +40 Critical Strike
- Equip: Your spell critical strikes have a chance to increase your spell power by 190 for 15 sec.
- Requires Level 70
- Sell Price: 9
11
60
Sextant of Unstable Currents is an epic trinket for DPS casters.
Source
This item drops from Fathom-Lord Karathress in Serpentshrine Cavern.
Notes
- There is an internal cooldown that prevents this trinket from proccing more than once every 45 seconds.
- The proc chance is 20%.
Effective Damage
The effective +damage granted by this trinket is achieved in a method almost identical to that of 
[Shiffar's Nexus-Horn]. Essentially, to get the most out of this trinket, you want shorter cast times, and higher crit.
The formula for calculating the amount of effective +damage granted by Sextant of Unstable Currents is -
E = 190 * 15 / (45 + (t / (0.2 * c)))
Where...
E = effective +damage t = cast time c = critical strike chance
The following Java Program can be used to obtain a table of effective +damage for different casting speeds:
public static void main(String[] args)
{
float crit;
float time;
float effective;
for(time = 1; time < 6.5f; time += 0.5f)
{
for(crit = 10; crit < 101; crit++)
{
effective = 190 * 15 / (45 + (time / (0.2f * (crit / 100))));
System.out.println("" + crit + "" + time + "" + effective + "");
}
}
}
- 1.5s - Scorch, Searing Pain, Wrath
| Base Crit % | Cast Time | Effective +Damage |
|---|---|---|
| 20.0 | 1.5 | 34.545456 |
| 25.0 | 1.5 | 38.0 |
| 30.0 | 1.5 | 40.714287 |
| 35.0 | 1.5 | 42.903225 |
| 40.0 | 1.5 | 44.705883 |
| 45.0 | 1.5 | 46.216217 |
| 50.0 | 1.5 | 47.5 |
- 2.0s - Lightning Bolt
| Base Crit % | Cast Time | Effective +Damage |
|---|---|---|
| 20.0 | 2.0 | 30.0 |
| 25.0 | 2.0 | 33.52941 |
| 30.0 | 2.0 | 36.38298 |
| 35.0 | 2.0 | 38.737865 |
| 40.0 | 2.0 | 40.714287 |
| 45.0 | 2.0 | 42.396694 |
| 50.0 | 2.0 | 43.846153 |
- 2.5s - Frostbolt, Shadowbolt, Incinerate
| Base Crit % | Cast Time | Effective +Damage |
|---|---|---|
| 20.0 | 2.5 | 26.511627 |
| 25.0 | 2.5 | 30.0 |
| 30.0 | 2.5 | 32.884617 |
| 35.0 | 2.5 | 35.309734 |
| 40.0 | 2.5 | 37.37705 |
| 45.0 | 2.5 | 39.160305 |
| 50.0 | 2.5 | 40.714287 |
- 3.0s - Fireball
| Base Crit % | Cast Time | Effective +Damage |
|---|---|---|
| 20.0 | 3.0 | 23.750002 |
| 25.0 | 3.0 | 27.142857 |
| 30.0 | 3.0 | 30.0 |
| 35.0 | 3.0 | 32.439022 |
| 40.0 | 3.0 | 34.545456 |
| 45.0 | 3.0 | 36.382977 |
| 50.0 | 3.0 | 38.0 |
