>>105880343
lightx2v can actually work if not using it at full strength and combining it with other snakeoil like accvid/causvid, but yeah there's no such thing as lossless optimization when it comes to hyper/lightning loras.
>>105880276
FusionX is a bad merge, it has these loras baked in https://huggingface.co/alibaba-pai/Wan2.1-Fun-Reward-LoRAs/tree/main and they tend to alter faces in i2v and sometimes cause gray artifacts.