" @ShaneDev: The end of Exodus is exactly where I'm at right now in my Legendary playthrough.  Everytime I get that last Brute's shield down I get hit with his goddamn Fuel Rod Cannon or he sticks me with some mircale throw of a plasma grenade.   That happened a few times in a row and I got impatient - getting killed by Jackals rushing to him - so I turned it off, hoping to finish it after work today.   "

I personally find it literally IMPOSSIBLE! Then again, I can't even play that game on Heroic.

Just beat Exodus last night on legendary. It was easier than I thought it would be but also I think I just ended up taking the right paths at the right time. As was said there is an active camo (which in legendary is very useful), a rocket launcher, and a sniper rifle spread out across the beach side of that open area. 
 
I sat back and sniped out all but two enemies in the building from a distance, brutes and all, and simply walked up the staircase to success. Once you get rid of the tanks and ghosts it's really not too bad.

My advice for the end of Exodus is take out the Wraiths, steal a Ghost, kill as much that way as you can, and then use the jetpack you hopefully held on to to just jump straight to the final button. The second you hit it it's mission end, and it's the only way I could do it on Heroic even...

"I'm so awesome at games let me post about the lack of challenge I found in it's hardest difficulty" 
 
"Baha! All these keyboard warriors will crown me god of their new kingdom!" 

I tried the two first playable levels on legendary, sure I got through them, but the second one gave me some trouble in the beginning, however, the hunters were just fun.