Wan2.2 i2v (clarifications needed regarding settings on low vram system)

hey fellas, how are you all doing?

i’ll get right to the point. im new to i2v but after a few weeks of trial and error im starting to get the hang of things. there is a lot of information available out there but my god is it contradictory. sometimes ive gotten better results by doing the exact opposite of what a lot of people absolutely swear by. it doesnt help that im on a very modest entry level setup (8gb 4060 laptop). a lot of forum posts and articles seem to be written with heftier setups in mind. so i think i have reached the limit of what i can achieve through personal experimentation and following advice not designed for my quantized setup. things like “oh, just increase cfg for more obedience” while i increased gradually one decimal at a time with the same exact seed and prompt till cfg3 and saw absolutely ZERO difference. my render time is way too slow to effectively do micro tweaks and get any real results in an acceptable time frame. (im working on getting a 24gb setup in about 4 months but i dont wanna sit idle in the meantime)

“I’m running a highly optimized Wan I2V setup. It’s a GGUF-based workflow using the wan2.2-rapid-aio weights. quantized Q4_K GGUF. I’ve got SageAttention and BlockSwapping enabled to handle the VRAM load.”

i gotta be honest, ive gotten very good results on occasion, even when it comes to very specific things. my problem is consistency. i will work on one picture for an entire day through trial and error, then as soon as its a slightly different picture i have to start from scratch. im using sa_solver (beta) 4 steps, 1.0cfg, denoise 0.6, sd3 shift 8. i know this sounds ridiculous but i swear of all the things ive tried this is the only one that gets me any results so far (and quite quickly as well). the reason i use ksampler and not ksampler advance is because when i used wan2.1 the video was exactly as the source picture but after transitioning to 2.2 the video was way blurrier , less vivid, less sharp, felt less hd and the general hue is much more “reddish”. the denoise option set to 0.6 helps with all that

i just wanna know what should be my settings starting point and what should i be gradually increasing to see improvement. the most important aspect for me is face consistency and obedience to prompts. remember, i have an 8gb card so things start to turn into a deep fried lsd fever dream with cfg past 3. would you suggest any additional nodes to my setup? different sampler? different settings? my goal is to be 100% authentic to the source image. no embellishment from ai. no scifi themes or fantasy or anything like that. i basically wanna make the picture move, thats it. if im in a scenario where the ai isnt obeying prompts what should i do? (other than “try different prompts”. cause im trying to isolate how far i can push the ai before refining prompts. i wanna get a good baseline first)

please give me some pointers for my specific setup and goals, thank you very much in advance