With the changes from the new expansion, there is no reason not to have “Iron Will” turned on. It gives you a huge enmity boost with no downside. Make sure you have it turned on at the start of the dungeon.

Flash was also taken away because there is no need for it anymore. Total Eclipse -> Prominence combo spam on big pulls will safely hold threat on on everything. There’s not much more to worry about at your level except for using your defensive cooldowns wisely.