If using Sword Strap then Ace's Leggings, Rajas Ring, Unkai Haidate +2, Unkai Mimikazari and Brutal Earring are all you need to have 6-hit (17.1tp return). You can use Oneiros Ring if you want and have MP merits, Juogi/+1, Ganesha's Mala etc etc. And also have complete freedom in your WS build.