I use "mixed" corner aim with one player coming short (who is good at crossing) 1 on near post, 1 standing on far post, 1 challenging keeper, 2 players back, 2 CB or SBs lurking, and one player (striker with good finishing) going forward.
If the corner is hit to any of the guys on the posts or the keeper, they will have a good chance of hitting a header on target because the striker who is "forward" attracts double or even triple marking leaving some room for the guys along the goalline to score. If the ball doesn't find it's target, sometimes the 'Forward" striker will latch onto the ball and fire it into the net (which is why it's a striker in that role so he doesn't miss the shot)
The 2 defensive players lurking typically keeps them about 25 yards out, giving them room to run back into defensive position to prevent counters, or it lets them use their good heading and strength to knock the ball back into the box. The player who comes short will sometimes receive the corner, drawing 1 or 2 players out of the box and then crossing it in, and sometimes he will dart into the box for a shot. Sometimes when the corner is hit into the penalty area, the player who comes short will be running into the box and can latch onto throughballs for good shooting chances.
I think it's a realistic tactic, it scores occasionally and doesn't exploit. It also takes advantage of not being predictable and is even fun to watch sometimes. If my description wasn't adequate enough I can go over it again.
