Female led relationships discussion

When my wife and I first began our FRL, the initial implement I purchased for her was a flogger. For some time, it served as her go-to option for both punishment and play. However, as we moved forward, I introduced additional toys into the mix: a riding crop, a hickory paddle, and a 4ft leather whip (which is now her top pick). With this expanding collection of tools, my wife has mostly stopped using the flogger. Her reasoning is that it feels like too much labor for what she gets out of it, yielding the least impact among the options. Consequently, she rarely reaches for it anymore. I promised to buy her a replacement, but I’m undecided on which style to choose. My goal is finding one that delivers maximum results (which in her terms means more pain) while requiring minimal effort from her side. Does anyone have suggestions for a flogger we might like?