Echoing Fury helps if you manually cast the primaries. A lot of the top leaderboard spots including my solo GR130 clear used Echoing Fury because we stand and fire more than Strafe (used for repositioning and movement).
The only viable alternative is Odyssey’s End but that build is a lot more involved to play. See Dieoxide’s post here for more information on that.
For speed runs, Fortress Ballista feels like the best fit with Squirt’s Necklace but a little more toughness would help keep the shield intact.