As you will know Seroquel is a very calming anti psychotic, whereas
Invega is quite agitating, I think by dropping the
Invega you will have a lot less side effects ( fingers crossed )
You might feel quite drowsy for a few weeks because of the Seroquel but the extra 50mg he has given you isn't going to be too harsh, my doc usually increases my Seroquel by 100mg.
With it being the XR version as well, you will have less drowsiness.