Mig-31 as the ultimate fighter ?

In my opinion Mig-31 appear to be a very good 6 gen fighter
mig-31 can achieve max altitude of 123,524 ft , and reach a top speed of mach 2.83 even with 2 fuel tank and 6 missiles making it virtually immune to any other fighters , even the very modern one such as F-22 , F-35 , su-27s ,PAK-FA , Eurofighter ( because at high altitude the air is very thin so the small fin of AA missiles like aim-120 , R-77 or Meteor will be useless they willnot be able to turn at all , and also they have to climb such a long distance that they will loss most of their energy to intercept the very fast mig-31 )
http://en.wikipedia.org/wiki/Mikoyan_MiG-31
also since the mig-31 fly at much higher altitude and faster speed ,it’s missiles will have much superior energy , thus have extremely long range and , harder for enemies to evade even if both side use the same missile , the superior altitude also help mig-31 to see enemy from the top which have alot bigger RCS so stealth fighter like PAK-FA , F-22 or F-35 willnot be a problem ( apart from IRST ,Mig-31 also have actual L-band radar unlike the su-27s )
so in my opinion there is nothing can beat the mig-31 in BVR

the Mig-31 may seem like it very weak in WVR when it run out of missiles as it turn very slow and can only sustain 5 G ( a bit better than F-35 ), however contrast to popular belief turn rate is not the most important factor in dogfight , WW I and WW II battles shown that boom and zoom fighters will win against burn and turn fighter most of the time because they can dictate the engagement (ex : hell cat vs zero )so the most important factor in dogfight actually is speed and acceleration , since the top speed of mig-31 is mach 2.83 even with 6 missiles, it alot faster than any other fighter , and with the thrust/weight ratio of 1.30 http://www.angelfire.com/falcon/fighterplanes/texts/articles/twr.html it simplyhave acceleration better than most , if not all fighters ( included F-22 and Eurofighter )

what your opinion about this ?