Powerhead Placement help

[Travillion]

Hey all,
I've been running a 28G Cube for the past couple of months and while everything is doing well, I feel that the powerhead could be in a better placement. The output from the overflow is on the top left side. The LR is built upwards in a pyramid shape nearly centred. Right now I have my powerhead in the top left front, pointing upwards to create surface agitation. My thoughts are this, if I angle my output from the overflow upwards for surface agitation, where should my powerhead placement go?
I will attach a picture shortly for a better idea.