I'm not so sure mate. Arsenal's fixtures look quite easy and while they tend to collapse in the run-in they look much better this season IMHO. I'd say it's fair to assume we'll win five or our remaining home games and draw two considering our home form - that's 65 points then.
Leaving the obvious three difficult away games (Chelsea, Arsenal, Liverpool) aside we still have to play Blackpool, Wolves, Wigan, Blackburn, Newcastle and West Ham on their pitch. I'd say we'll beat Blackpool, Wigan and West Ham and will have trouble at all the other locations... 13 points sounds about right, we always have a shock defeat somewhere in there every season. 78 points, how many can we take from the Emirates, Stamford Bridge and Anfield? If, and that's a big if, we manage to win five out of six of the 'easier' away games we're basically home and dry, especially if we manage to esape beating at the Emirates too. Do you really think that 80 points will be enough?
I don't think we are going to draw two home games, they seem easy on paper and the only two in which we might have trouble are City and Chelsea but looking at how City set up against top sides and how poor Chelsea are, I can see us winning both.
Arsenal will have to do 8pts better in the second half of season than they did in the first half to get to 80pts mark, it's fair to assume that they will do that but they won't do much better. 80 should be enough, perhaps 82 or 83. Onoy Arsenal can take the title from us this season as neither City nor Chelsea will get there, and don't even get me started on Spurs.