Hiya
One thing that hasnt been mentioned here is if the loans need LMI.
If yes, then under a mill is a good position before you move, if no, then its not that critical, unless your servicing is tight.
If your servicing is tight, by spreading the loans, the lower exposure to the last lender will mean you will get a better hearing, because many lenders dont load other lenders loans with PI penalties or their own assessment margins.
ta
rolf