4s or 5s lion or lipo

Ok, but do you think the 9918 will easilly be able to handle the 7xl on 5s or would it get to hot thermal and possibly be damaged.
I've had bad luck in the past letting the smoke out of 2 schulze 18.97's that were in an emaxx with a hacker 9L and only 14 cells.

Also are there any advantages besides weight in going lipo over lion? The thing I really like about the emoli cells is I can build the packs how I want and really get the buggy balanced well, a slightly heavier well-ballanced buggy will perform better on the track than a light off-balanced buggy.