Man... so many questions
Ur doing fine dps wise, I don't see much to critique from ur logs. Tortos dps is all about cheesing on bats, timing ur solar hurricane with it.
Yeah the vp trinket is not good, well, it doesn't work well with our haste build that is.
Yes, we trust wrath calcs. I personally ran with a lfr gloves for a while to keep my 4 set up eventhough i had a 522 non-token ones, it was still o slight dps gain.
I noticed a nice dps gain after getting the proper 522 token gloves + the cha-ye trinket (which was when I got rid of my vp trinket and went for the haste build).
As for 20k overall, not sure, u'd have to sim. U could prob go for less, i.e. 17k combined, but it might hurt you more on movement-heavy fights with less SS procs. I still rememeber 2 lockouts ago when on durumu during the maze I had a lot of SS procs, it was reaaly awesome
Question for you though: how exactly are you managing ur treants? Can't really see this properly on WoL yet, but are you making sure you time them with at least a trinket and meta proc?
PS: if ur so much into optimizing ur deeps, why not drop herbalism for a better raiding prof? I dropped skinning for engineering, gained another CD (Synapse Springs) that is pretty awesome to boost my burst on pull and after that I macro it with my treants.