short answer is: Forget about a RTW ticket if YYC/WAW/NRT are your only stops, it´s not worth the money. If you had asked a few weeks ago I may have reccommended a RTW ex-CPH, but the fares just increased substantially, the cheapest YRTW now is $3k++ and wouldn´t start in any of the countries you´re intending to visit.
I´d reccommend the following options:
1) any ticket YYC-Europe and a separate, nested ticket Europe-NRT (I´d reccommend LX in booking class H which is reasonably priced and upgrable using AE miles at time of booking)
2) If you really want to do a RTW, look into NZ fares Europe-AKL (most options are LON-AKL). Some of those fares allow a routing via NRT and Canada, e.g. LHR-NRT(VS/LH)-AKL(NZ)-YVR(NZ)-YYC(AC)-LHR(AC)