Ent Ancients should be revamped to a similar concept as the other evaluation bosses. Specifically referring to the amount of idle time when waiting for the hero to become vulnerable. See, for Ghost Kings, you’re trying to at least kill the ghost master or other ghosts to find the master for it to become vulnerable. For liches, while they can take longer to do if buffed, you’re still actively taking down soul bearers for the mystic ST set and to, ultimately, defeat the lich.
The Ent Ancient, however, is a boring evaluation boss because of its growth phase. No matter how buffed it is, you have to wait for this useless waste of resources to grow to its full size which takes, what, half a minute? Half a minute of waiting for this dang piece of wood to grow, and you have to wipe out up to 25 of them in a realm to close it. It’s pretty terrible considering unlike the other 2, nothing you do will speed up the process of seeing Groot grow up, and you had no choice in choosing whether you want to wait this long to kill it, unlike the other 2 bosses. That all adds up to a lot of time staring at a splinter grow into wood instead of actively killing it, and it frustrates me :l