Yes , definately the way to go if you want to reach 1.2 bar boost throughout the year.
You'll find that if you fit a restrictor ring to give you 1.2 bar in the freezing cold of winter , when the weather warms up to the higher temps on a summers day you'll be boosting to maybe just over 1 bar.
This is obviously because the density of the air will change as the ambient temp changes.
Like Nic says, raise it from 1.0 bar (with a restrictor ring fitted) to 1.2 bar with a boost controller to is the best way to go as it will give you this level of boost irrespective of the ambient temperature.