They are all important to make a fighter successfull. There can be an aircraft with superior quality in terms of performance, but if it is unserviceable or too costly it won't be the greatest. And if you can't get the logistics to work, you'll end up with all your high performance aircraft on the ground.
Nowadays flexibility is a very important factor in making a fighter a success in both commercial and military areas. If that's in the performance option, then I would vote for that. Another important success factor would be the power to weight ratio, also in performance. I see speed and range as performance as well.
But it all depends how all things are put together.
I actually think speed is less important, as long as it isn't too slow, when talking about a multi-role fighter and not an aircraft specialised for interception. And recent fighters show this, they have lower maximum speeds than aircraft from the third generation. It is compromised for other good stuff.