Bale has scored 6 of Spurs' last 7 league goals. That's three winning goals and one equaliser, earning his team an extra 7 points. Without him in their side we could be just 2 points behind them.
Cazorla hasn't had quite the same impact at Arsenal but he has been the difference in matches against Villa and Sunderland, earning an extra 4 points for his team.
We could do with somebody to step to the fore ourselves. If I was the manager I might drop Fellaini back alongside Gibson to shore things up now that he's not as effective as an attacking force and give Mirallas freedom in the hole to find us some goals.