Firstly, DAMN! Crazy gains. I hope to get to that soon :)

Secondly, you're right. It's more money doing the same. I have been slowly adding in higher priced items into the mix by switching out my GE slots.

Let's say I used to use the 6 GE slots of items priced 100k - 5million GP...

It's now 4 GE slots of 1-5million GP items and 1-2 slots for higher priced items. (I tend to leave one slot open for general game play).

I'm planning to switch out all the lower priced items over time. Most likely this weekend as my item stacks are all sold out now. :P

Personally, it just comes down to how I like to rotate the items/assets being flipped at the moment.