Funneling fix
Have you considered: making a team share a static bounty count if there are two instances of smite on one team?
For example, the funnelled champ received a bounty of 450, the rest of their teams bounty gets set to the same amount, and stays that way until the 450 bounty had been surpassed, reobtained or collected.
I know that may not cover funnellers that only take one smite, but it would allow for some dynamic team strategies in that one circumstance and create a better risk reward metric.