Should Skill Speed/Spell Speed affect certain abilities?

[Ladon]

I ask you read my first and last sentence of my post, then you would see that my suggestion doesn't include the 'oGCDs' (buffs) you're mentioning. Additionally, if you use your oGCDs outside of buff windows, you lose more than using it 1-2 more times in 10 min.

Take GNB as an example, Blasting Zone has a 30s recast and is used with No Mercy every other time. 10 min means 20 Blasting Zone casts, 10 of them in buff windows with +20%, that's equal to +10% on it. If you misalign it to get 1-2 more casts that is 5-10% - OUTSIDE the buff windows. You don't win anything by doing that. It's the same reason you use every other Gnashing Fang in No Mercy, that rule doesn't change for Blasting Zone!

The situation right now is: the longer the fight the higher the chance that your oGCDs misalign with your buff windows because you clip them sooner or later. Or you would've to delay your buff window to re-align with your oGCDs.

Buffs will still be unaffected by SkS/SpS!

This really does not solve an issue then. You really are not in any danger of your oGCDs drifting outside of your buff windows by simply using your oGCDs a bit after you actually use the buff. Using your gunbreaker example, blasting zone isn’t used until two GCDs into No Mercy. How would it be possible for this to ever drift outside of the NM window?

[ArianeEwah]

This really does not solve an issue then. You really are not in any danger of your oGCDs drifting outside of your buff windows by simply using your oGCDs a bit after you actually use the buff.

Well, not immediately, but it shows its effects after a few minutes. Let's say in our GNB example, we have a NIN in our party who uses Trick Attack on point everytime it's ready. We want our buffed Blasting Zone fit into this TA window. This will go well for the first 4-5 min, but it will be difficult to hit it every 60s in a 10s window because we clip/hold Blasting Zone for ~1s everytime it comes off CD because of GCD recast (optimal 2.4s). There is actually a Voidwalker speed run where a GNB started their first BZ at 0:10, and their 11th at 5:19!

Another example is WAR, and Upheaval: It's also because of our GCD that we hold Upheaval for ~1⁄3 GCD every 30s. That means if IR (90s recast) is used exactly everytime it's ready, Upheaval drifts 1 GCD behind everytime we use IR. So, 1st IR Upheaval is used after 1st FC, 2nd IR it's used after 2nd FC and so on. Yet, if we do not delay IR one bit (which ofc we dont want that to happen) at our 5th IR Upheaval would fall behind the 5th FC and thus wouldn't be inside IR anymore.

So, the question remains: do we delay our GCD to keep our oGCDs aligned? Keep the GCD rollin' and misalign our oGCDs with our buffs? Or delay our buffs, so that our CDs align once more?
Either way it's a loss, and that is when SkS/SpS starts to hurt instead of being benefical.

I know it's a little exaggerated as the effects show themselves after minutes of '100% uptime fights', but I hope you get the picture and what I was trying to suggest here.