I did this item in simulator couple of times ,
How we managed it was assuming like an engine fail.its just a matter of handling not so many presure on you cause it is still supplying the rest , except thrust.
And i remember one time , one of our smart instructor
, gave engine fail #2 after take off , and when we were dealing with it during holding he gave Thurst Lever Fault #1
So he was ttrying to get us lose both thrust during aproch when we selected flaps1
But no
we didn'buy it so , we dealed it like a slat flap jam.
Going around and retracting flaps doesn't work.
And PLEASE don't think or do any CB pulling other than written in the QRH especially Fadec it may cause sooo much trouble than you think,and you probably will be questioned about this wise disicion.
May be we can think of why airbus has decided it to come to idle when flaps is selected.
They could advise to make an auto land since it works fine while the A/THR is on , or if Autoland is not possible ,eng master off when thrust idle.
Or a combinaiton of these what do you think?