So using that system a Slasher with a combination of Lesser and Greater Undertakings has three dread powers putting them on part with potency 1-3 Horrors. Of course the above is written presuming my homebrew which has Atrocity, a universal applicability for Personal Banes and a version of Hell is Other people updated to second edition and made universally applicable as well, but for a general guide for assigning Dread Powers for Slashers, it's handy....