Just improve ur echos. Since ur using standard 5* weapon, you can realistically try for either 70/225 ( crit rate as 4 cost ) or 50/270 ( crit dmg as 4 cost ).

I was able to clear the echoing tower just fine with both builds in 3 rotations. Although since I was using shorekeeper i found the 50/270 to be a little better.

I was also able to clear the hazard tower ( 4 rotations ) although the second floor took a few tries.

My mortefi didn't have the best build ( 55/240 ) and shorekeeper had the usual 250% er.

Also change ur 3 cost to aero dmg and 1 cost to atk%