Hordes of LWF or Few Hi-Tech Heavy Fighters

I am really starting to question heavier fighters. I am starting to see hordes of smaller and inexpensive BVR ARH fighters(like FC-1/A-50 with AIM-120, etc) as a better option than a few high tech expensive fighters(like Su-35/F-15K, etc). For a single F-15K which costs some 80-100mn, I can get probably 3-4 A-50s armed with AIM-120(lets say they cost 25-30mn), and same can be said that for one Su-35 which should cost some 40mn, I could probably get 2-2.5 FC-1s(lets say it costs 15-20mn).

Who would win in the BVR arena?

When other factors are concerned, the heavier fighters should be able to deliver ordinance at a much longer distance, less pilots would be required, a single F-15K would probably be cheaper to maintain than 3-4 A/F-50s though those A-50s would be able to deliver much more ordinance than a single F-15K. Those heavier fighters might also enjoy carrying much larger weapons too.