I'm alright in castings because I try and talk as much as I can, but my downfall is that I'm rubbish at most of the competition! I've found these practice links to be pretty useful in helping me improve though so I'd thought I'd post them in case anyone as awful at Comps me hadn't seen them before :)
I played my first frookies recently, everyone was active, and the game went so quickly that sometimes it was quite hard to keep up! On the other hand, all the fastings I've played in have had at least one inactive, and sometimes people evict active players over them, meaning that they slow down the game.