I haven't read the entire thread so bear with me. If your just starting out, hack, research, and hunt for adam vials. This will boost your overall score. It helps. If you know you can't take down the big daddy at least get off a few shots. Try to grab the bd suit. You may die quickly but at least you still get adam for it. Most importantly, move around. Don't just stand still. Also start private matches alone to get the feeling for the map, test your weapons and plasmid combos. This is what I did and still do.