I haven't finished reading this really long thread yet...so I'm not sure if what I put up here is...plus half of them are odd and for fun.
One tip to use with assisting a teammate is be careful with ranged attacks. Half the time the one you're assisting takes out the enemy before you. If you're at the end of a single mob, hold off as you both get closed to killing the last bad guy. A few times I had a power slotted up as they defeated the villian. Sometimes you shoot off at the already defeated...sometimes you don't. Problem is they may start cycling through a new mob to see how many lts and bosses there are etc, while your attack is still selected from the last fight. Of course if they're within range your attack goes off...they come straight for you when no one is ready for it.
Assisting is a great way to get rid of mobs faster
I know this works with the assault rifle...if you have it out and you do the "bow" emote, you act like you're shooting an arrow.
If you're like me and you have fun dancing on coh, do the bind- /bind (key) "$$ em dance"
Press it really fast and you cycle through the dances and it looks really odd. Add some more binds by replacing dance up there with other emotes. cycle through a bunch of them and it looks really cool. If you want to do leg movements bind kneel and yoga (each one you start going to position with either your right or your left leg).
Some people don't know this but you can tp yourself in really weird places for fun. In the city hall, the reflection on the ground is just an upside down city hall which you can tp yourself into. you can also tp under overpasses (though they might have changed this)
For awhile I didn't realize you can throw caltrops underwater...(stupid murky sewer waters...)
I may think of more eventually...heheheh