It never hurts to add power handling by adding more components in the way you've described. So I wouldn't try to talk you out of it. It adds protection in cases where higher-than-normal spectral density is sent to the parts in question. It reduces thermal shifts, distributes the heat among more components and reduces the chance of failure. Reducing heat is always good. That's why my horn tweeter crossovers use R1a, b, c and d components where almost everyone else uses just one resistor.That said, I've never run into trouble on the one π and two π speakers using a single 10 watt damper resistor. They're only designed for 100 watts total, and most of this goes to the midwoofer.