My E-Maxx with batteries is actually heavier than my TNX. It has the red springs and 30 wt oil. It seems to work good with that set up, but that also has some shock mounting options and I have them mounted further out. If you plan on doing big air jumping, stay with the heavier shock oil and use heavier springs. That will help keep it from bottoming out. It all depends what you plan on doing with the truck. Ideally you don't want it running with the shocks fully extended. It should have some sag to it. My TNX has the powerstrokes with 30 wt oil I believe. I may try a little heavier oil in the rear shocks to keep the rear end from dropping so much when on the throttle.