No, dont'. At least not mindlessly.
Watch the Ragna and what his blockstrings, pressure patterns, and spacing tendencies seem to be. Then react with the appropriate drive for the situation. For example, if he seems to love throwing out dash 5B or using 2A on your wake up, 2D will high profile both of these. If he tries a reckless jump in, 4D will kill it completely. If he tries to do some fancy, risky stuff, react with which ever drive will work best in that situation, keeping in mind what moves beat which drives.
ONCE you've gotten them scared of your drive, you can start pressuring them and frame trapping them your own way. And if they try to get out of that (without using DP), watch their tendencies and drive through them.
I'm sure Luna can elaborate more, but that's just somethings to keep in mind. The point is that you want to make them scared of drive, so you can start having an easier time getting in.