Why would you do it any other way?
Do what the book says -- two 90 degree torques, in sequence. I have no idea what NM or ft lbs these torques require, but it is alot because you are stretching steel as you are torquing.
Get a grease pencil or paint pen and mark your bolts before you do the two torques, so you'll know when you've reached exactly 90degrees each time.
'91 300E, 208k miles