Riding the clutch is bad, vey bad, horrible, no good, rotten, disasterous idea. Unless replacing the clutch disc, pressure plate, throwout bearing and flywheel on a regular basis sounds like a good time. There's no reason for the Mirage's clutch to need replacement before 150k+ if driven properly. Riding the clutch will guarantee you a trip to the dealer or transmission shop in 10k or less depending how much you let it slip. You could cook a clutch in under 1 minute if You are aggressive about slippage.
View my fuel log 2015 Mirage ES 1.2 automatic: 40.4 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.5 mpg (Imp)