Balancing

I seem to have stuck at 200mg Seroquel and seems to be balancing me quite well for last three weeks. The idea was I will be increased to 300mg before my next appointment in October, if that’s required. Has anyone been recommended following a mixed episode to have seroquel with gradual increase as and when required, but found a lower dose worked than what they were going to be aiming for? Also is 200mg a low dose ?