We basically need Reus or Cavani. We can get by with one of Giroud and Welbeck/Walcott/Chambo in the front line, but not in both positions. Not if we genuinely want to win shit.
We are exactly one injury to Alexis away from struggling for goals. We are also one injury to Coquelin away from having minimal protection to our back 5 in place as well. To me, it is very obvious that both those positions need filling ahead of anything else.
I hate to use Moron as any sort of example, but there is absolutely no way he would put out a team without Matic/Ramires/Mikel in the middle to give protection to the back 5. The difference is that they have Hazard in the front line. It means that they don't have to over commit players forward, regardless of opposition. They mostly rely on Hazard, Costa, Fabregas, Oscar, Willian and one of their FBs to be enough to win them games. They do this while still maintaining defensive solidity. Costa is a LOT better than Giroud, and they also have Hazard. We have Alexis who is on par with Hazard, but that's it. They have two world class players in their front 3, and we have one. We need one more. Then it matters little what Coquelin does when we have the ball, and that shouldn't be his responsibility anyway IMO.