The M7 of the JLA, along with teamwork from the other members, can out power or even just out last the Avengers in a fight.
And your proof of this is? Esp given that I've shown already how your "big guns" can be handled by multiple Avengers?
Isn't this also assuming that the JLA would not use team work? Are you telling me that JLA would not watch each others back? You used an example of "dog piling", while dog piling is a good, proven method, it does have its own fatal flaws. Think of it as a blitz used in football. When the defense uses the blitz, it risks leaving one or more people wide open and can allow for a big play like a receiver open with lots of running room due to a mismatch or blown coverage; or a screen play that leaves the running back with a lot of open field. Double or triple teaming has the same weakness, someone would be open, or in a mismatch. The same can be said in battle. Concentrating your forces leaves other areas with little, to no defense.
The JLA would not let its members go solo. Let's look at Superman vs. Thor. WW with her powers from the Olympian gods could add a second punch against Thor. She is strong, near Superman's level, trained in multiple forms of combat with a high resistance to injury, her Lasso could be used to bind Thor, and as I understand it, it cannot be broken. That can give Superman precious time to batter Thor with a few super speed punches. If The Scarlet Witch tried to attack Superman, knowing he is as vulnerable to magic as anyone, he could then be backed up by Dr. Fate or Zatanna or The Phantom Stranger.
Like I said before teamwork can be used by either side, and, as you said, you can come up with any number of counter parts to battle one another.
I am just of this attitude (and this isn't the first time I've encountered it) that the Justice League are these all-powerful gods that no hero or villain in any universe can EVER hope to withstand.
They're powerful, no doubt about it...but they are NOT invincible. No matter how many times you say it, Ive shown you a refutation of it, showing how a specific Avenger or Avengers can handle them.
The JLA and Avengers are strong teams. However, when I mention teamwork works for the JLA too, you don't refute that. They both use team work. Both teams would most likely fight in small groups so as to guard each others back.
Simply reiterating "It's tEh SUPERman! (or wGrEEn LanTERN, or hoever) is not proving anything.
I don't think I ever said that, I haven't looked back through the thread, so maybe I did. I don't know. It's late and I have to get up early to go to Mass. However if I did say it's Superman along with GL then that would be a combo that the Avengers would need to quickly counter with one of their own. Then again, the JLA could use Superman, GL and WW as a way to draw fire from the the other Avengers' big guns, leaving the remain 4 of the M7 (You know this is really the first time I have heard that term used in reference to the JLA and I can only think of 5 who could be in it: SM, GL, WW, BM and tMM) to heavy hit weaker Avengers. Again team work.
And just so you don't miss it: I DO NOT DOUBT THAT FOR EVER MEMBER OF THE JLA THERE IS AN AVENGER THAT CAN COUNTER THEM AND VICE VERSA.
"Counter" does not mean beat.
I am of the opinion that the JLA can beat the Avengers. The battle would be bloody, some members may even end up dead (and I wouldn't want to live anywhere in the same state that the battle takes place in) but in MY opinion, the JLA, while bloodied would be the last team standing; at worst it would be a Pyrrhic Victory.