I believe the question is that if you had a full grid of same-element LB3 assault weapons, which would you invest your resources in: a SR Assault or a SSR defender weapon. I think you could make an argument for either. I haven't ran the calculations on what combination of eidolons and assault/defender choice would maximize damage for a given threshold of HP bonus, though someone could easily do so with the tools I've made available and the various known max weapon stats. There's no reason for me to run that analysis until I confront that decision myself.