I feel that future enemies similar to Triaggelos, may cause some operators to become irrelevant because the attack interruption mechanic.

Short story, I got Last Rite and builded my team mostly around her, so basically: Last Rite, Ardelia, Xaihi, and Endministrator because she is cute. Triaggelos feels like if it was designed by a hater, because the red circle attack spam (the one you must interrup with a skill), Last Rite and Xaihi were kinda useless, also Ardelia, since she is quite slow.

Im not saying the boss was too hard... but if like most gachas, future enemies become more crazy with their attacks, the operators whose skill doesnt involve a direct attack may become mostly useless.