p4p includes p4p strength, i wouldnt include julie, she is a fantastic fighter and has many strengths but power isnt one of them im not by any means saying she isnt strong but p4p no way i would put her above helene.
i havent seen chali fight so cant comment but believe me sarah macarthy can bang. she hits really, really hard and is very accurate. im heavier than her and she mauls me all over. she is also one of the strongest clinchers anywhere in 58-60kg bracket.