Seroquel 300mg XR. 1x morning and 1x night?

Do you guys think this will work? Seroquel 300mg XR in the morning and then at sleep? Has anyone been on a similar dosage?

Currently im on abilify maintenna 200mg each 4 weeks and Seroquel 300mg XR in the morning and at sleep, I am transitioning to be only taking the seroquel, I don’t know if my psychiatrist will be upping the dosage but do you guys think at this current dosage and schedule it would be ok? I believe the therapeutic dose of seroquel is 450mg but could be wrong…