So as you know boost is based on transform level of used item. Here is some info.
When you are boosting with the same type (physical for example) you get extra 10% points.
Same for the part of mech (legs for example) - extra 10% when it is the same.
When you are using both bonuses at once you get extra 20%.
400 points from common
Just for fun info:
7400 from legendary
51500 from maxed mythical
61800 from maxed mythical (same type and part)
As you can see commons are complete trash ;p
If you have some thoughts about boosting please write them. I’d like to read some