Rank the Avengers team members according to importance

1. Captain America - is the glue that keeps the team together and focuses team on goals. Has proven in CW and IW that he can still successfully lead a team despite having only minimal team members. Also the best tactical thinker on the team and is the team's moral compass. 

2. Tony Stark - his resources and intel is what allows the Avengers to function at their peak. Without him the Avengers will be bogged down with such mundane things as needing to fly commercial, getting stuck in traffic, having to pay rent, not knowing where villains are striking, etc. He's also the smartest man on the team. 

3. Thor - currently the most powerful member of the team. Majority of the Avengers' fights would not have been winnable without the muscle that Thor brings. The team could probably send Thor to take out entire armies by himself. He's also their most knowledgeable member when it comes to cosmic intel and currently has the ability to teleport.  

4. Black Widow - the only spy in the team. Hawkeye apparently is also a spy but we've never seen him actually apply it. When it comes to subterfuge or espionage, Black Widow is the team's best hope. She's also a pretty decent hacker.

5. Wanda - currently the only telekinetic and pseudo-telepath on the team. Is able to create shields to protect numerous team members, able to lift them in the air, take out poison gas, contain bombs, etc. Has the potential to be one of the most powerful members. Just needs a bit more training and experience.

6. Vision - probably the 2nd most currently powerful member after Thor, he's also the most logical among the team. His phasing ability is unique to himself and can definitely be useful for the team. Add to that his strength, durability, mind gem and ability to utilize Mjolnir and he's definitely one person you want on your team.

7. Spiderman - something that he demonstrated in CW and IW is that he's very good at assisting other teammates. Whether he's catching them and making sure they don't get hurt or webbing up opponents to make them easier for the others to take out. He may not be the team's mvp but he has pretty good assists. His strength, agility and intelligence are also nothing to scoff at.

8. Hulk - though physically the strongest member of the team, his brawn is pretty redundant with Thor and Vision already on the team. And unlike Thor and Vision, Hulk doesn't really bring anything else to the table other than brawn. Banner's intellect is useful though, but it seems his knowledge can be something the team can acquire by consulting other experts in the field (though with difficulty). Still, Hulk's brawn and Banner's intellect make him a decent contribution to the team.

9. Warmachine - pretty much 2nd-rate version of IM. Anything WM can do, IM can do better. But he's more powerful than the other 2 after him so he gets this spot.

10. Falcon - can fly but is not as fast a flier as IM (and probably Thor) and isn't as mobile a flier as Vision (who can levitate). Has some pretty good weaponry but nowhere near as lethal as IM or WM. In short, everything he can do, someone else can do better.

11. Hawekeye - he's not that great in a physical fight, pretty much anyone on this list can beat him in h2h except for Falcon which would be debatable. He's a great marksman but that's easily compensated for with targeting systems like IM, WM and Falcon use. His weapons are decent but honestly have the weakest destructive output among those with weapons other than Black Widow. But unlike Widow, he hasn't shown the ability for hacking, spycraft or seduction. In short, not only does he bring nothing unique to the team, but the stuff he does bring are subpar compared to what others already have.