well i think i just fixed my own issues, i guess i changed my waterresolution to 4096 and forgot about, and now im back at 40 fps with all my mods still in tact, but there's still a choppy issues tho, inside the buildings or whatever it's the worst, but when i step outside everything nice and smooth, still not sure what's causing that
In another thread someone mentioned a tool called Nvidia Inspector, its a video card tool with a number of features including a realtime monitor that shows running graphs of what various components are up to. I suggest grabbing that and setting it up to watch all the various stats but the key ones to watch are the again the memory usage vs the MCU. You'll likely notice that as your laggy FPS occurs the MCU's workload graph shows more activity, this is your card swapping its memory around to meet your current view's needs as it can't keep everything in memory that your settings are asking it to. Ideally you want that MCU to be doing almost nothing except during drastic changes of scenery. Catching that 4096x4096 water is a good sign and yah that'll tax your vram heavily too, continue looking for things like that and aim to get the MCU doing as little as possible and you'll see further smoothness. Skyrim doesn't really like alt-tabbing in and out of it but you can still play with a few settings, run around for a bit and exit out to see what everything was up to. The other fantastic tool though is the LAA loader, at least with it in play skyrim can put more of itself into system ram which is much faster to access then reading it off your disk on the fly.
Great tools any ways and helped me find a nice balance of pretty vs performance.