If you are lean and have water managed properly, you can run 750mg of test right into a show. This will work just fine for most. Really though, it is a very individual thing. I can't tell you what would look best without watching watching your body transform as you close into the show. For most of my clients, by the last 4-6 wks, we are checking in with prics mulitple times per week and by the end, they are sending pics every couple of hours. I can't say what any of them will need to do next without seeing whats happening and watching how they respond to the changes we have been making. The goal is to always come in dry but full. Most of this is going to be done through diet, fluid and mineral manipulation. If you need to make a weight class, that is also going to have to do more with diet. If you find that you aren't hard enough at 4 wks out, you might still be fat. Fat will draw more water in. I've seen guys win at national shows running over a gram of test and still have shredded glutes. It can certainly be done. 

Sorry to sound so vague. It's a person to person decision. If you find that you aren't able to control water by 4 wks out, you could reduce test at that time or switch to prop

On this note, if any of my readers are looking for a diet plan to get in shape, gain muscle or for contest prep, I am once again accepting clients. Check me out here at Naps, Next Level Nutrition. I plan to take on about 5 more guys total.