Training with different weights might give me imbalance IF training with an heavier load provide a stronger stimulus.
It does. Unless you feel like you need to reinvent the wheel, there is no point. It's common sense, but there are surely some studies out there that look at this. Google it and you'll keep from wasting a bunch of time and effort.
No such thing!
If you don't know whether your method is going to work, then you have problems. Narrow it down to these three basic outcomes:
-It won't work.
-It won't work well.
-It will work well.
Based on everything I know, you're going to fall somewhere between "It won't work" and "It won't work well". I'm sure the majority of the people on the board, if not all, will agree.
There are plenty of proven routines and methods. It honestly sounds like you're just having a science experiment and you're not too concerned with getting stronger. If you actually want to get stronger and not waste your time, you could do some reading and find out why your theory is false while following a good routine. It is not at all complicated if you take the time to educate yourself.
If you do make strength gains, they will not be maximal. Period. The frequency and percentages you are using dictate that this is not an effective program. IF you are serious about strength training or bodybuilding, then you're wasting your time.
With that said, I appreciate the fact that you're trying to do something different. I hope you will take a look at what you're doing and realize what you need to do. Good luck