No, but idling multiple games simultaneously will increase the time between drops.

so first make all games to 2 hours and then do single single game right? perfect way to do it fast?

Yes. I used to idle 50+ at a time using SAM, back when trading cards were relatively new. They don't care how many games you open at once. If your system can support it, you can actually -open- 50 games at once and they won't mind. There's a reason your steam library now tracks multiple games running in the list view itself.