1: More people than just sdfilm use the minimi effectively
2: HK can easily take down 2 people in one mag
3: I recommend minimi and hk, dont master just one of them, master both, short/medium maps the hk is god and longer maps (such as b2b & conquest) minimi is great choice. Once you get a comfortable feel for the minimi, try the ruger out, you'll notice its not to difficult to use after a while and you'll dominate the field with your unstoppable gun choices.