I suggest to print 2 version of character of some characters(one - original, second - balanced). Let players to choose which one they want to play|add to character pool.
1, Flint Westwood [4 life points]Once per your turn, you may trade one card from hand for one random card from any player's hand.
2, Greygory Deck [3 life point]
3, Lee Van Kliff[4 life points] Once per your turn, you may discard BANG card to repeat effect of last played brown-border card.
4, John Pain [4 life point] Decrease number from unless you have 6 card to unless you have [4-5] cards.
Rest characters are OK.