Personal story using Summoner

[Lollie]

The dragon doesnt taunt off you because you are supposed to use its aoe to kill the other mobs particularly the knight. Before they nerfed it that was the only way to kill it as it would heal significantly.

There are enemies in the game that are untauntable and usually it is for a reason other than ohmygodimonfire

Fun bonus fact the bosses in SV hard can hit each other.