We present a novel approach to increase the number of quasi-degenerate states, and by consequence the rate for reverse intersystem crossing, by increasing the number of repeat units in a highly twisted donor-acceptor oligomer. In contrast to earlier related work, we are able to preserve the emission energy and spectral shape. This was achieved by using an ortho substitution pattern of the donor units about the BN acceptor that also translated to a highly twisted conformation for each of the emitters. This molecular design results in only limited conjugation throughout the oligomer so that the blue emission is preserved along the series, and it also limits the interaction between hole and electron densities, resulting in each of the emitters retaining their small DEST. In this way, our approach provides a route towards efficient blue TADF emission.