Warming up equipment

Just looking for a little guidance. I am the proud owner of a dream come true, a Pass X250.8. (The bank is sharing this dream too)  I was told by the seller, Reno Hi-Fi,Mark, that the proper sequence of operation, is the following:  Upon turning your system on, the AMP should be last to be activated, and the first to be turned off.  

My question is: Is it OK,  just to turn the AMP on for a couple of hours, and nothing else prior to listening, and then activating  pre amp, Dac, CD transport, etc when actually ready to start listening?  Or better to start everything in proper sequence 2 hrs earlier, and just leave on until ready. Thanks        Robert TN   Afraid of any surge possibilities!!!!