Nibali and Kittel are not exactly the same ... maybe it is your eyesight

I agree with most here, the stress of a top 10, especially in a race of 25 is not worth the hassle, unless you are on patrol for your team, or you want the extra work for training. For me the mental stress is worse than the physical toll as I just don't like to bump with the top 10 all day long.

The last 1/4 of a lap of any race is going to be a full out sprint, so again like the rest said you need to be a sprinter to play with those people. This is not threshold or Vo2Max work, but pure sprint work. Now if you don't have the Threshold or Vo2Max to hang on during the race, that could be an issue, but based on what you said, that is not the case.

You need to make the race harder by jumping much earlier, one or two laps to go ... whatever you can handle. If it doesn't work, oh well, waiting till the end didn't work either. Don't worry if you don't get a huge gap, just keep going and see what your limit is, sometimes the rubber band will snap or another guy will see it and want to help out. Getting two or three guys to really push the pace for the last couple of laps can help detour the sprinters, so talk to others if you can't do it yourself.

Sit on 100% in dead last place, then move up in the final 3 laps only (I do this very very often in races). See if that helps your sprint, it is possible, but again you still need to figure out where your jump spot is, might still be 1 or 2 laps out and not in the final 1/4 of a lap. Where you jump in the final of a race is as much genetics as training, so test different spots and see where your sweet spot is.

Play leadout, just go to the front at the start of the final lap and hammer. Sure you might get passed, but starting from the front you will find your true limit and it might tire out some of the sprinters and change the order. Find at least one sprinter you like and let them know so worst case you are giving a leadout to someone who will be happy afterwards.

If none of that works you need to get in breaks or train differently. You don't need to put out 900 watts for a final lap effort, half that would likely be enough. However you are going to likely need to put out more than 900w if you want to play just the last 1/4 of a lap.

Biggest thing, if it doesn't work, try again. Doesn't matter if you try the same thing or something different, but make sure you finish blown and tired. Eventually something will work out and either the group will let you go, or you will find something that works regardless of the group. Group dynamics plays into the finish more than your own personal fitness and strategy.

Edit: The last lap, or even 2 or more for me is pretty much a sprint. I am doing 5 seconds on, rest for the corner and 5 seconds on again for the straights. I put out the most power on the final straight before the finish as I consider that the finish line and then use the corners at near max speed to limit any passing. The actual final sprint is not so much that as just using anything I have left to get over the line. My sprint power was used up in the previous straights.