I try and do them all at once, sometime I can and sometime takes some tweaking , be careful when bending at the fads especially with it being that thick, they will sometimes split back into the handle when bending backwards that much following a growth ring as it goes.
I usually put a block and clamp right where the handle ends to help prevent that from happening, also be sure and clamp down the other limb at least at the fad to keep it from rocking, if it rocks as you heat and clamp the limb you are working on of course you aren't bending the wood, just rocking it on the form.
Pappy