Roe in the morning, till 10ish.... Blades later in the day, post 10ish, basically..... But it all depends on the water conditions/color/speedof water. Also has a lot to do with the weather. Sunny/Cloudy/overcast/raining. If cloudy, raining, deeper water with moderate speed you can stick with roe a bit longer if not all day. If sunny, slowerish water, not really overcast, you may need to go smaller, or a blade......basically.....
For example, on Sunday I got both my Coho on Blades. Both were after 11 am. Today, I got all my Coho on Roe, nothing on a blade. Lost one first light, then nothing for a while and then got a Wild and both my hatchery fish today after 11 am, as I said on Roe. But they were in deeper water and I can take a stab that they hadn't seen much all day considering that I didn't really see to much fishing pressure below me in the general area.
SO who knows......