Hey, I can't give any precise advice as to what your pressure would be because I don't know much at all when it comes to optimizing therapy but I would recommend reposting with OSCAR because I don't see a graph of flow limits present. I don't know if it is necessary but it is always in the recommended layout of screenshots. If no one else responds tonight I would recommend raising your minimum pressure to 6. That's what was recommended to me when I first started APAP by the advisory board members.
Also, you seem to be having a large amount of leaks. Are you using a full face mask or a nasal mask. If you're using a nasal mask it could be that air is taking the path of least resistance out of your mouth, causing leaks. Also based on the clustering of events and low flow rate with high peaks
http://www.apneaboard.com/wiki/images/c/..._Apnea.png (Image of positional apnea on wiki), I'd wager that you have positional apnea, also known as chin tucking. This is treated with a chin strap (works for some), or with a soft cervical collar (works for most). I use a soft cervical collar and it prevents my chin from tucking at all, and is barely noticeable after a few days. (Depends on fit)
I only replied because it seems your post fell under the radar unfortunately and have almost no business giving advice, and this is based on my own experiences. I wouldn't recommend acting upon my recommendations until an Advisory member or someone with significantly more experience in dealing with these problems responds, except for the change to min pressure 6.
Good luck with your therapy.