Bug Zapper gives three effects:
- You are permanently affected by Empower. It is identical to Tassadar's Empower, except for the fact that it is permanent. Empower damage improves at a rate of 0.3 damage per level.
- Every 8 seconds, you have a 60% chance to fire a single Corona beam and a single Mjölnir Protocol discharge.
- A 10% increase in auto-attack speed
For reference, here are the numbers (assuming no talents):
- Range: 9
- Damage: 70
- Period: 1.5 / 1.1 = 1.36 seconds (due to the 10% increase in auto attack speed)
- DPS: 70 dmg / 1.36 seconds = 51 DPS
- Range: 6
- Damage: 160 (-75% against buildings)
- DPS: 160 dmg * 0.6 proc / 8 seconds = 12 DPS
- Mjlnir Primary
- Range: 5
- Damage: 90 (+25 against light)
- DPS: 90 dmg * 0.6 proc / 8 seconds = 6.75 DPS
- Mjlnir Secondary (3 forks from primary target)
- Range: 4 (from primary target)
- Damage: 35 (+15 against light)
- Max DPS (3 targets): 35 dmg * 3 targets * 0.6 proc / 8 seconds = 7.875 DPS
- Total DPS = 78
At present, Bug Zapper is inferior to Onslaught, Weaponsmith, Toxic Waste, Hell Divers, and Air support in terms of the DPS boost. Even for heroes with attack speed modifiers, such as Strafe for Nova and Stimpack for Anvil, bug zapper is still not worth it compared to other much more useful perks. Even under ideal endgame conditions with ideal characters, you're looking at a range of 90 to 300 DPS, in addition to the 10% attack speed increase.
Once Tychus acquires Psionic Warrior Mastery, his attack speed nearly triples, which means that with bug zapper the Empower period decreases based on limitless talents:
- 0 Limitless, 1.5 / (1.1 * 1.2^3) = 0.789 = 89 DPS
- 1 Limitless, 1.5 / (1.1 * 1.3^3) = 0.621 = 113 DPS
- 2 Limitless, 1.5 / (1.1 * 1.4^3) = 0.497 = 141 DPS
- 2 Limitless, plus stim 1.5 / (1.1 * 1.4^3 * 1.51) = 0.329 = 211 DPS
Tychus is one of the few characters where a 10% increased attack speed also will significantly help his overall DPS, since his attack speed is already so low. At his peak an additional 10% attack speed can increase his damage by 150 to 250 DPS, depending on other perks.
Nova is another ideal candidate for bug zapper due to strafe. With lightweight and only basic upgrades, strafe loses 20% damage, 6x faster attack, 4 second duration, and 7 second cooldown. At max, strafe gets 2% damage, 7x faster attack, 5 second duration, and 7 second cooldown. At worst, Bug Zapper's empower provides 140 DPS to Nova in early game, assuming she has the energy to support constant strafing, which is comparable to a non-leadership Air support.
- Minimum, 1.5 / (1.1 * 6) = 0.227 peak, 0.398 with cooldown = 308 - 20% peak DPS, 176 - 20% average DPS
- Maximum, 1.5 / (1.1 * 7) = 0.195 peak, 0.272 with cooldown = 359 + 2% peak DPS, 257 + 2% average DPS
Nova's attack damage scales greatly by level, so Bug Zapper's 10% attack speed helps some, but it's most useful in the late game.
While it's not usually recommended, Predator and Anvil also have talents that will upgrade Bug Zapper's Corona and Bug Zapper respectively.
Finally Dune can utilize Bug Zapper's 10% increased attack speed to effectively increase his rage generation, but this is almost always not recommended.