Vautour was officially rated 176 for his Kempton run, and 173 for his Cheltenham run, I don't know where you got the 5lbs higher figures but its not from the official handicappers. Vautour 176 rating sounds about right to me beating Al Ferof 13 lengths. Silviniaco Conti was rated 177 for beating Al Ferof 14 lengths in 2013. Al Ferof was thereabouts in the last 3 renewals and its a good marker because he was always at his best at the start of season, the rest of the placed horses confirm that view as well.
The thing about Vautour's Cheltenham was that he was twice taking on inferior animals and even though he beat them well, he didn't take part in a championship race. This season will be his moment of glory if he has one in him, but if Don comes back to his best its going to be hard for anything in the race anyways. Thistlecrack will be wasted by going KG first and will simply be a lost novice when he gets to the big day, connections will regret their decision to go Kempton so then they might choose the safest option in the RSA or potentially reverse over hurdles. If Coneygree comes back to his best, he'll make it a stamina test which won't suit Vautour who was backpedaling in a 3 mile race on a flat course. Djak 2nd twice, still has this on the target so maybe 3rd time lucky. Of the outsiders I have Seeyouatmidnight, More of That and Irish Cavalier on my radar. Douvan is a joke at the prices, the hype will cost some Mullins lovers plenty money especially backing him for this and the KG. Killultagh Vic would be a viable contender but Mullins will cover the Ryanair with him, probably same with Black Hercules. Don Poli has been exposed, now with different trainer he might get into places as he's a classic runner for a GC with loads of stamina but no class but might win it simply thanks to a good ride. If the classier horses turn up on the day he's got no chances. Zabana & Road to Riches could also fit that category. Cue Card sadly appears to have lost his form from last season but he could recover and maybe put up a great display, at least for the first 3 miles.
Just hope to see a no-excuses Vautour turn up, see what he can do, Coneygree and Don back to their best, and CC to recover his form and we'll be in for a real treat. If Thistlecrack connections find some sense and gradually ramp him up instead of killing him in the KG, then even better as the race will have a classic look to it. At the moment thats a big IF because Don might even be retired if he's not showing signs of being '120%', Coneygree might not be the force from 2 years ago and CC might not recover his form so who knows what we'll end up with but thats why I'll keep an eye on the aforementioned outsiders.