Since there's apparently a canon example of this combination coming up and Tactical Operations p. 349 doesn't quite seem to answer my questions about how it's supposed to work, I thought I'd pass them on:
1.) Can a WiGE with VJJs engage them while airborne, and if so, does this impact how high it can jump?
2.) Assuming the answer to 1.) is a yes, can the WiGE retain its airborne status at the end of the jump -- assuming that it jumped at least 5 hexes if need be -- or does it have to land? (And if it should stay airborne, how does that affect the motive system damage roll at the end of the jump?)