Quote (SpaceMonkeySteve)
Yes, but you can have your strong Navi go bust in harder areas to get strong chips, then use your weaker Navi to blitz through it's early stages.
At the same time, it won't matter how fast they go through the early stages and would probably even be more convenient without drawback... if it weren't for the fact that we're talking about having some mechanical advantage from getting the multi-Navi upgrade now. ^^;