Echo

[Lemon8or]

On the other hand the fight was well-tuned and a pretty easy 'dance' to learn, and now the phaseshifts can be very messy and you have to be pretty careful how much dps you're doing at certain points, to the point that i had a better chance of winning before 2.2

Depends. Before 2.2, other people in my FC couldn't kill heart before circle bomb which leads to the ermergerd moments when that and landslide comes out and people still try to kill the heart. If you're already killing titan before 2.2, you won't even need 5% echo.

so the content has to tolerate people making mistakes and not working perfectly together as a team.

Not Coil or coil 2. Raid contents have always been aimed towards people that work as a team to perfection. Otherwise, where's the challenge for them? The echo helps put your minds away from DPS/heal check and focus on executing mechanics.