The burning chariot can still be usable in friendly games if you get 2 lesser rewards (assault shooting or wapon) and actually use the chariot for assaults.
You get a long charge range, lots of hits from both rider and how, and with some luck you end up ready to torrent the enemy come your next turn.
Not a solid tactics, i agree, but the unit has been of surprising use to me (if it survive first turn

)
You are not locked in combat, so if you survive the assault you can fire next turn either way.