I tried serina from Sussex and didn't find her to be appealing. If Kat from ex ssds was a 10 then serina would be a 6 for me.
I would recommend going to DOS. I tried that H cup ml that ahlungor always recommends (can't remember her name but I'm sure you can find out). Long list of extras (so much better than Brisbane). Pretty good. Not sure if other MLs provide the same services tho.
And yeah, can't go wrong with ginza.
I also frequented 533 Willoughby but after my last visit I think I won't ever go back again even tho it's value for money.
God I miss Sydney!