Personally, I recommend that you do not work through the guides in sequential order. Again everybody has different learning styles, but I think in general it is best to study a balanced focus on quant and verbal during individual study sessions or over a couple of study sessions. Not sure what your study schedule will look like, but if you work through the guides in sequential order you won't touch verbal until the 6th guide. If you spend a few hours every night it could be weeks before you see verbal strategy. Also, once you begin verbal strategy guides you may forget the quant principles and strategies form weeks ago. I think it would be best to work through a specific 2 quant guides and a verbal strategy guide and then move on to the next pairing of quant and verbal guides.
I would recommend going through a few chapters of each strategy guide only one time and working through the in action problems un-timed. After doing this, go to your
OG 12th ed. and look at the corresponding problems (they are detailed in each study guide) for the material you have just covered and work through some of those problems timed. If you struggle in some areas go back and read those specific sections again and then work a couple more problems.
As far as mixing and question types within verbal and quant, this is always a good idea. Do 10 question timed drills picking a few random questions from the
OG problem lists for material you have covered out of the strategy guides. The more guides you knock out, the more question types you should pull from. Ultimately when you have done everything, your timed drills of 10 to 20 questions will include everything.
Hopefully this helps. Best of luck. If you have any other questions feel free to ask. I'm no expert as I haven't hit my goal score yet, but I have worked through all of the guides. I now have a month of pure drilling through
OG, VR, an QR timed questions and a weekly CAT exam.