Damage Number Question

I am curious about the damage numbers for smn. I played in aetherochemical dungeon and on the first boss I noticed my dots were ticking for exactly 1362, 704, 554 for bio2, miasma1, and bio1 respectively after a fester spell was used. This was during the part where he spawns turrets and everyone is scrambling to kill turrets because he keeps teleporting. My question is by how much damage does spell speed factor in the damage for smn.

My stats are 832 int, 592 ss without food if I swap a few pieces of gear around i can get 610 ss and still have 832 int. In a party I have 857 int. Basically, how much more dmg does high ss add for dot dmg?

Please share your numbers, I would like to know so that I can know what to try aim for?

It's a very miniscule amount. Someone tested it before with iirc 200 or 300 ss difference and the results was just a few points of damage increase of around 5-10?

I believe I've read it is around 72.5 SS = +1% DoT damage. Not impressive, but it has a non-trivial impact when you get down to the granularity of stat weights.

Thanks. So then it really is no need for ss stacking then it seems. That seems a waste but then again I understand why it isn't that significant.