It's how you were expected to tank fp's in WoW when I played that during Lich King. People would complain if you went one group at a time. Going back to Solo Play, you can do the same thing with a companion cleaning up mobs and/or healing you. It goes a lot smoother and faster than one group at a time.

It's kind of like what you do while tanking mobs in fp's. You don't need to wait till the current group is all the way dead before pulling the next group. As long as you've properly built up threat, you can move on to the next pull and the current mobs will follow while the dps mops up. There's no need to make a huge production out of every pull. Hell, in certain situations I just pull the whole room.

Tanks can pull more mobs lol. It's really simple to do. The melee ones follow you the whole way and the ranged will have to follow you a bit, which usually leaves them clumped together. So you go grab the next group, then cluster them all together. It's not that hard and is way more engaging than grabbing one group at a time as a dps. And it's not faster because you deal more damage. It's faster because you have no downtime and are taking on 15 mobs at a time instead of 5. After work I'll upload a video and show you what I mean.

Well, if leveling/solo content is boring as a tank, you're doing it wrong. Done right, the tank can clear a room just as fast (if not faster) than a DPS. DPS does one mob group at a time. They enter combat, finish, heal, then move on and enter combat. A tank with a healer comp can pull one group, aoe them, then pull another group or two, aoe them to death, then leap to the next group when he starts running low on enemies. As long as he picks off all the ranged enemies before he moves on, the surviving melee enemies will follow him to the next group. He can keep this strategy up till the room is clear. No need for stopping to rest and refresh in between groups. It's also highly satisfying to use. You honestly feel like an immovable object while surrounded by ten to fifteen enemies and laughing at their puny attempts to kill you while using Guardian Slash to merc 7 at a time. If you just go one group at a time, I can see how it would be slow and boring, but you can offset that by using the tank's strengths to your advantage. It's also good practice for building and maintaining threat over large groups of mobs. Edit: In all fairness, idk how well this works in endgame content, but for leveling it's a blast.