I'm okay with the search feature. If you're too high a level, you're exposed since your health reward is too big. If you don't snatch away kills from the wrong people at the wrong time, and have always your defense mode ready, you can rank pretty good. I did #18 playing by myself (no chatrooms, ganging and stuff), doing a little less than 3000 attacks and being around level 2500 on Facebook. Never ranked worse than #200 playing like that until now.