I do not believe they are mutually exclusive, when both are used. I started out only wearing the extender for most of the first year, then I decided to add in more warming, gentler jelqing & use of a pump. The jelqing is "moderate", the pump is used before mounting into the extender, and afterwards to restore circulation.
This means I can't separate accurately, which technique gets credit for how much. However thats not a show stopper, as it's progress over *months* that I strive for.
No matter what you decide to use, take great care not to physically overdo things. A Day of rest, here & there, can expedite results.