[Nahte]

Grouping is different of course, but for solo I've found this works for me:
Also, as was already said, crossing chunks causes the pet to lose its abilities to be controlled manually. Underworld Journey seems to confuse the pet as well.

Send in 'TheGimp' and let him get a hit in on the mob (first hit on a mob has HUGE aggro effects PC and NPC alike)

Once the pet has landed a hit:
cast Torment
click Poison Claw from pet
cast Plague of Infestation
cast Devouring Shadows

If at any point in this the mob comes towards you, click Sneer and the mob snaps back to the pet.

At this point, I heal TheGimp if he needs it, otherwise I toss a Bone Spike or two, keeping the dots active as needed. If the mob comes at me and sneer is down, I start spamming Drain Life if needed.

This works on 1, 2 and 3sot mobs.

For the 4 Dot bad boys, like The Beast on the Qa Riverbank, I used to kill a few crocks along the beach but do NOT loot them (corpses stay longer if they have loot on them). Then I send in TheGimp, toss my 3 dots and hit his poison, Death Incarnate the Abomination, and run to 40 meters from the 4-dot mob (in this case The Beast). Cast Ritual Animatus on a nearby crock corpse and send him in while running again to 40 meters. Turn and reapply the 24 second dots while walking backwards and reapply torment. In the case of The Beast, if he hits you - you die (snaring affect from his attack and he eats you in about 3 seconds) The Abo can NOT tank the 4dot mobs.
At level 12 (The Beast if lvl 11) it took me about 2 minutes to kill thim. At 14 when I got DI/RA it only took about 1.5 minutes or 3 snares.

I group a lot with a Sorc friend and if he waits a couple seconds before unloading the Abo can usually tank long enough for us to kill a 3dot mob together - and if the sorc pulls aggro, he just tosses his 70% snare and the Abo starts following and beating on the mob. Its good either way.