The quasar Eigenvector-1/Main Sequence (E1/MS) is a practical roadmap that organizes AGN spectral diversity by accretion state, letting us compare objects in a common, physically motivated trend. Past applications of the E1/MS sequence made it possible to identify the effects of intrinsic viewing angle, black hole mass, and luminosity. We propose an E1/MS-driven framework to clarify the accretion status of gamma-ray-emitting AGN with an emphasis on radio-loud narrow-line Seyfert 1s (NLSy1s) and ​Population A sources. We argue that the E1/MS context is ideal for flagging super-Eddington candidates among radio-loud NLSy1s and other Population A sources that also host relativistic jets. An optimal strategy would be to place gamma-ray AGN on E1 using optical/UV spectroscopy, to derive disk-based bolometric luminosities from line or IR reprocessing (or jet-quiet SED states), and to correct single-epoch black hole masses for orientation and radiation pressure biases. This strategy should identify super-Eddington candidates and reflect a physical link between accretion state and gamma-ray efficiency: dense broad-line region/torus photon fields in high-Eddington-ratio systems should boost the external Compton emission, whereas mass loading and radiative drag shape moderate bulk Lorentz factors in gamma-ray emitters observed with VLBI. We apply the method based on the E1/MS criteria to targets for which high-S/N optical and UV spectra as well as multi-frequency coverage are available.