Per my experience The optimal strategy is to deprioritize eating the ghost. You can get some nice streaks sometimes eating him but it generally doesn’t help.
What you want to do is use the power up to collect the middle dots. The sides you can collect safely on reflexes alone. By about 3000 points it becomes impossible to recover if you don’t pick up the middle and have consumed your power up. Eating the ghost is ok if it happens incidentally.
Because you’re trying to use the power up to collect the middle that often means the ghost will be further from the middle than you when you finish a line. So finish a line, then 180 immediately to collect the middle again. The worst case is you end up with your power up ending just as you’re finishing a line and you are on the side. But up until very high point values I think it’s always safe to grab the power up as it tends to be on the sides.
Edit: 6800
Might play more if other HNers step up their game :)