You wouldn't want a regulator though, because if you used that method upon death you would come back weaker, since it functions with regular souls and the WoL's is considerably denser after additional Rejoinings. You'd go from The WoL to the Wol We Have At Home.
If you'd want a denser soul you'd be in the same predicament that electric horse catgirl is in, since doesn't she need your denser soul for her own regulator purposes?