Definitely not on ultra, I play games on med-high depending on how gpu heavy they are. And I sometimes play with Twitch on to watch a tournament or something. LoL has loading screen, that and time for game to actually start gives me enough time to do a rift. Same thing with BF4. I have enough time to play a quick small game. Or for both of them I can start before I get in a queue for LoL.
This is for my new computer, which will have an i5-4690k and 600-700 W power supply