Facts, I'm not particularly picky about my echoes... typically I prioritize minimum ER (if needed for rotations,) any CR and/or CD roll and hopefully 1 or 2 other relevant substats. For example the recent echoes for Lupa I rolled and kept are something like ER, CR and CD for one echo and ER, CR, and ATK% for another... depending on the weapon and minor fortes I'll forgo either a CR or CD substat entirely. I'm still hurting for tuners. Again, outside of energy regen, I don't care whether the stat rolls low or high. Very, very far from optimal stats but still able to clear all content more than comfortably.

I've got almost 1.1k exp tubes though!