I often play crash site and spears, so usually I go against someone with a sheild every so often. How are you supposed to win a one-on-one encounter with someone with a sheild? If I get close, I get my face bashed in, and if I take my time they'll throw it at me. A grenade might work, but I usually use mine before that. Last time I ended up just standing there bcause I didn't know how to approach it, and don't get me started on when Incame across two with shields!