PS4 Resident Evil 5 Mercenaries United solo Ship Deck Chris Safari 150 kills

after i completed my 150 kills challenge with all the reunion characters in every stage. i knew i would not be able to do the same with the original characters. weaker weapons, weaker melee moves. believe me, i have tried a few times, i was right, no can't do. then i thought i might just try certain characters in certain stage. because certain character does have advantage in certain stages. so this is the one, and it has not been easy.