How SS is calculated and works

[Judge_Xero]

I'm not sure if anything has changed since you did your testing but taking averages from 60+ skill usages with varying amounts of SS is showing per point gains.

The only anomaly being Spells where the Cast is the same as Recast, there seems to be some sort of extra delay.

Bard: @ +462 SS (7%)(93)
Heavy Shot (2.32 in game)
Averaged 2.323

Calculated - 2.325

Bard: @ + 435 SS (6.59%)(93.401)
Heavy Shot (2.33 in game)
Averaged 2.333

Calcualted - 2.335025

Bard: @ + 423 SS (6.409)(93.59)
Heavy Shot (2.34 in game)
Averaged 2.3372

Calcualted - 2.33975

BRD @ + 426 SS (6.4545%)(93.5454)
Heavy Shot (2.34 in game)
Averaged 2.3369

Calcualted 2.338635

Bard: @ +0 SS
Heavy Shot (2.5 in game)
Averaged 2.506

Calculated 2.5

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Also wanted to mention as from above while the issue of a delay where cast/recast times match up is not an issue for most Jobs.
i.e. BLM,BRD,MCH - where Cast times are either longer or shorter than the Recast.

This issue is terrible for Summoner where all of their spells outside of Shadow Flare share a time with the recast. To highlight this I will show some of that data.

SMN - @+452 (6.85%)(93.152)
Ruin (in game 2.33)
Averaged - 2.4439
Calculated - 2.3288

Ruin II (in game 2.33)
Averaged - 2.335
Calcualted - 2.3288

Difference - 0.1089

SMN - @+0 SS
Ruin (in game 2.5)
Averaged - 2.616
Calculated - 2.5

Ruin II (in game 2.5)
Averaged - 2.5046
Calculated - 2.5

Difference - 0.01114

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SMN Comparison
Over 600s @ 2.5 GCD - shoud be 240 attacks
Actually 229.3577

4.5% less casts. Probably close to 2% DPS loss