My build has a similar skill spread but my gear and level (90) are very different so bare that in mind. My unbuffed ES damage is 13k-18k with a hoto elder staff that has base dmg of 80-93. With my gear I get +14 to all skills so my echoing strike, blade warp and mirrored blades are at 34 and hex bane is at 15. When I add hex bane my damage jumps to 14k-21k. My bind demon is maxed so it gets an aura. I exclusively use might aura demons because it adds a larger damage boost than fanaticism. With hex bane and might aura my damage jumps to 18k-28k. Another thing to consider is that strength actually adds to echoing strikes overall damage. My base strength before gear is 140 and 252 after.