I agree, I think your schedule is a little unrealistic. You are looking at a minimum of three days each way. From Red Deer I suggest Drumheller. Plan on two days at the Tyrrell museum and the badlands, too much to absorb in a day.
Edit: I just read your second post, you have ten days in the west. That makes a big difference. I suggest 11 to 93 then north to Jasper, the Icefields Parkway is spectacular. Hinton to Edmonton is uninspiring but if it has to be WEM so be it. From there take 21 south to 575 then east It is dead flat, you can see Saskatchewan from there. The road unexpectedly drops into the Red Deer river valley and the badlands. It's another world. Take the ferry the road goes past the museum.