First - no, not a hard manouvre by any means.
Second - two factors - controllability and performance.
You're in a left turn - the left engine fails. So initially, you will have a tendency to overbank and for the nose to drop & consequently speed to increase.
Ergo, first solve the controllability issue. Chances are that you'll already be correcting the overbank tendency with right aileron when you realise that you have a failure, so follow through on that and add the right rudder smoothly. If you need to sacrifice a bit of altitude to maintain control, so be it. You should be able to get away with either a level manouvre and a 5-10 kt. speed-drop or an altitude loss of 150-200 ft.
Only when you've got a positive roll rate to the right going can you consider adding power to the right engine - remember that you won't need TO/GA or even MCT, the aircraft will fly level @ F5 & 180 KIAS with around 70% N1, so initially don't add more thrust than you need to. Then, as the aircraft approaches level, you add whatever thrust is needed to reclaim the speed or the altitude sacrificed.
Best of luck!