In this paper, we propose a new method in which the LASSI model space selection scheme is "automatic". We call this method LASSI[r,q]. In this approach, instead of selecting the individual configurations by hand, the user simply must select the number of "electron hops" from one fragment to another, r, and the number of locally excited states to construct for each fragment, q. In the large-r, large-q limit, LASSI[r,q] reproduces CASCI (including the exponential cost). We perform test calculations on a triiron complex [Fe(III)Fe(III)Fe(II)(µ 3 -O)] 6+ , previously explored with multireference methods in Ref. 31 and its aluminum substituted variant -[Fe(III)Al(III)Fe(II)(µ 3 -O)] 6+ (henceforth "Fe 3 " and "AlFe 2 "), and show that qualitative agreement with CASCI low-energy spectra is achieved by r = 1 and q = 15 at the most, corresponding to multiple orders of magnitude fewer degrees of freedom than the CASCI limit. These calculations are described in Sec. 4 below.