Echo

[Kuwagami]

False. We helped some friends who started the game late, and echo on Titan EX helps a lot. 2 weeks ago, 2 of them were ready for Titan EX while we were raiding. They weren't really lucky with pugs, after 2h of tries, they never killed the heart. We had 2 possibilities :
1) Do 2 separate runs, they would probably die just after the heart and we would finish the fight with 3 DPS.
2) Take both of them, they have 2/3 tries after the heart and when the echo buff is strong enough, we would finish the fight with 2 DPS.

That's carrying players and it doesn't prove my statement to be false. Without echo they would have learned the after heart instead of being carried and won without it eventually. Echo just helped you carrying the 2 of them in one shot, which isn't really proving that "echo helps anyone beating the fight". It merely proves you can now merc 2 people at once instead of one by one.