Corlist's "Phantom and bubble oddities"

Major Update: Phasic ammo does ZERO damage to barriers. a phantom's bubble.

Summary
- If host characters hit the bubble with a hitscan weapon (piercing is unnecessary), it will do direct health damage to the phantom. No barrier damage will be inflicted without ammo. This damage is reduced by 75% (assuming DR instead of shield gate).
- If off-host characters hit the bubble with a hitscan weapon, it will do normal barrier damage.
- In all cases, graal shots did direct health damage and receive the 75% penalty.
- Approximately 2m worth of penetration is required to double hit the phantom reliably with a headshot. One shot can hit the bubble along with the phantom’s body.
- For double hit consistency, shoot the head of the phantom while it is facing you in her bubble.
- Ammo damage applies twice on double hits.
- Ammo damage applies normally (as though the phantom's body was hit) when the bubble is hit. This is the same for both hosts and off-host shooters.


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This lets any HOST sniper infiltrator (even duration spec) to 1 shot gold phantoms with a bodyshot.

Setup required:
Widow X: 1,246 (piercing V, HVB V, 2.85m pen.)
40% damage cloak + 25% sniper
Disruptor IV: 25% to health. 100% to shields and barriers

Off-host sniper infiltrators can do the same with lesser equipment
Mantis X: 886.4 (piercing V, HVB V, 2.35m pen.)
80% damage cloak + 25% sniper
Disruptor III: 15% to health. 60% to shields and barriers

A host max-damage GI can also cheese a gold phantom using the following setup:
Max damage GI + javelin X + barrel + SR Rail II + SR Gear VorMax damage GI (with speed hunter mode) + javelin X + barrel + SR Rail III + SR Gear Vcloak + proxy mine + shoot bubble (no body hit needed) = instant kill
1687.5 health
1545.8 * 1.35 * (1 + 0.8 + 0.225 + 0.175 + 0.25 + 0.2 + 0.15) * 1.2 = 7,011.74887,011.7488 / 4 = 1,815.5421 (>1687.5)

Video proof of the javelin GI bubble shot instant kill. Thanks to tyhw and sirian for the video.


3075 barriers and 1687.5 health

Cloaked bodyshot on gold phantom (HOST)

1) Ammo damage is applied to barriers
1246 * 1.25 * 0.25 * 4 = 1,557.5 (1558)
3075 - 1558 = 1,517

2) Shot damage goes to health directly
1246 * 1.25 * (1 + 0.25 + 0.4) * 0.25 = 642.46875
1687.5 - 642.46875 = 1,045.03125

3) Ammo damage is applied normally (double hit + no pen. penalty + bleedthrough)
1246 * 1.25 * 0.25 * 4 = 1,557.5 (1558)
1517 - 1558 = -41
41 / 4 = 10.25
1,045.03125 - 10.25 = 1,034.78125

4) Shot damage is applied normally (double hit + no pen. penalty)
1246 * 1.25 * (1 + 0.25 + 0.4) = 2,569.875
2,569.875 > 1,034.78125

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Cloaked headshot on gold phantom (OFF-HOST, sniper infiltrator)

1) Ammo damage is applied to barriers
886.4 * 1.25 * 0.15 * 4 = 664.8 (665)
3075 - 665 = 2,410

2) Shot damage goes to barriers (shield gated and bleedthrough)
886.4 * 1.25 * (1 + 0.25 + 0.8) = 2,271.4 (2,272)
2,410 - 2,272 = 138

3) Ammo damage is applied normally (double hit + pen. penalty)
886.4 * 1.25 * 0.15 * 4 * 0.7 = 465.36 (466)
138 - 466 = -328
328 / 4 = 82
1687.5 - 82 = 1,605.5

4) Shot damage is applied normally (double hit + pen. penalty)
886.4 * (1 + 0.25 + 0.8) * 2.5 * 0.7 = 3,179.96
3,179.96 > 1,605.5

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data

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Thanks to tyhw, marsman, freekone and eelectrica for the help.