In this work, we theoretically examined enhancing PMET rates in the collective light-matter coupling regime in the presence of dark state transfer and cavity loss. We extended a simple ET model to include collective cavity coupling as well as dark state transfer, cavity loss, and coherent CW laser pumping. We derived the collective reaction coordinate of a PMET reaction between the UP and acceptor states and used it to prove that the driving force from the UP state is decreased by the collective light-matter coupling. We demonstrated the effect of this driving force modification by simulating PMET rate enhancement over a large range of N molecules in the Marcus regime and confirmed the excellent agreement between fitted rate constants from simulation and Marcus theory rate constants. We then showed how a CW laser tuned to the UP can partially or entirely avoid these suppressing effects of dark states and cavity loss and allow for orders of magnitude PMET rate enhancement in the collective limit. We demonstrate that using CW laser driving can effectively reduce the deleterious effect of cavity loss by replenishing the UP populations. Further, a reasonable size of Rabi splitting (larger than the re-organization energy) will able to reduce the rate of population decay from UP to dark states (phonon bottleneck effect ). All the parameters recorded in this work are experimentally relevant to the system of CdSe NPL coupled to the cavity, and can thus be experimentally tested in the near future. It may be worth mentioning that the CW representation is a much easier condition to achieve than a pulsed laser, and most of the photo driven chemistry is performed under a powerful CW source.