1.29 as in 129% or 29%? The first is unrealistic in the long run, the 2nd is only really realistic if you play micro stakes and put some more work into your game.

If you win a tournament for 100 buyins when you're ROI is only 30%, then you're instantly 98.7 buyins above what ROI for that one tournament. If you then break even over the next 75 tournaments or so you're back to your true level of ROI. MTTs will have massive break even and losing stretches because the winnings of just one or two tournaments will counteract that.