A lot of blah-blah-blah but here's the bottom line:
MSP bump stops should be the first thing you buy when you decide to lower your Protege.
Use stock bump stops on your lowered suspension and you'll have one or two fewer inches of suspension travel, resulting in crappy suspension dynamics when you more frequently hit your bump stops.
Use no bump stops and you risk destroying your new struts when they bottom out.
It's really that simple.