SMN BIS 2.3

[Havenchild]

Nobody's going to argue that stacking Spell Speed on Summoner is a terrible idea. But the stat itself isn't as useless as you make it out to be. Saying that amount of spells you can fit in 10 seconds is all good but you're not factoring in the fact that Spell Speed helps you reapply your DoTs faster after being affected by certain mechanics (Gaols in Titan Extreme or Scyla's Frozen Orb for examples) as well as helping you get off certain casts before you have to move, whether it's to avoid an AoE or while kiting.

Because most of these fights are scripted, you should in fact memorize when to clip some Dots on certain fights right before unavoidable moments, (Goals or Meteor Streams) in T9 is a good example. If timed appropriately you will rarely run into the moments you describe. Im fairly sure a majority of summoners only use Swiftcast for shadow flare and ressing as well. Not many think to use it when reapplying DoTs in the exact scenarios you describe. Yes it reduces Casting time of Bio2 -> Miasma and that's really all it does.

On an off note, with my current build I sit at 404 SS. I pretty much have a static rotation of skills on T9 and honestly when I've went as low as about 360ish or as high as 450ish, I've never noticed any difference of what I was able to achieve on my casts in accordance to the timing of the fight.

Moments such as when YanderePrincess is describing, more running into the GCD (waiting for it) to cast you next skill, should in general not happen as majority of the time, if not all the time, you should burn an OFF GCD skill while you wait so that when your finished with the animation of that skill, your GCD is already up. Basically buffering.