The main question I would ask you, Undead, is what makes it so hard? You overgear the instance by nearly 40 ilevels, and gathering a party of similarly geared people to smash it via PF isn't that hard (people flock to bonus like drugs for WT/tomes). IIRC, Cuff of the Son isn't an instance where one person totally ruins the run for everyone else if they mess up, so there may be other problems as well.

Is it the rotations? Do you have some personal deficit/impairment that predispositions you for struggles like slow reactions or palsy? Do you struggle with timings and mechanics in raids or more complicated fights? These are the kinds of questions you can ask yourself (I'm not asking you to answer them publicly) to help you find ways to improve.

If you want to improve your gameplay, figure out what your biggest weakness is, and then see what you can do about it. Adapt yourself, and I'm sure you can do better and clear any of the current normal mode raids. You also might want to try