Deathstroke could concivably beat her early in the series when shes not settled into her role experienced and still crying at the drop of a hat but as it goes on she just keeps getting pumped up
Theres also definatley NOT going to be a 1 hit KO battle.The Senshi routinely take hits from super powered monsters and are definately enhanced [Usagi surprised herself early in the series by whipping a bunch of full grown possesed and beefed up men bare handed with no effort]