I second this, all the titan runs I've done today are completely content with wiping after the first 2 phases because "Echo will carry us the last one" without actually realizing you should be able to get past heart without echo. If you need echo to get past heart, you're not going to stand a chance with phase 4.

I was healing a run, we got to 25% echo buff, and eventually the plan became "Spread out, eat your own plume and let healers heal through it" because echo let them safely not die during it.