i did..
private sel, private mel, instrument (in the twin), commercial multi, commercial single, mei, cfi, cfii

My rationale was that if I did the private multi after my single than all the hours in the twin would be PIC. The reason for doing all of the intitial ratings in the twin is because i needed to fly those hours anyway so I may as well build quality multi time while doing it. I finished all my ratings with a little over 100 multi pic and alot of that being solo XC and IFR.

To each is own as far as ratings go and my way was not the most economical but I got a really great deal on the twin, had a good portion payed by the gi bill and did not have to buy a block of multi time or pay a survey company to let me fly.

I have a lot of posts on here on how I did the training if you are interested just do a search or ask me.