What I use as well. Occasionally, though, if you get too many AW/GD/FD simultaneously, you can run into issues trying to keep ANY pet alive, if the spawn are stubborn and cluster around the chest to where you can't lure them out from the others to solo each one. I once had a map on Tram Buc's Den that was a level 6, but had 4 AW, 3 GD (or was it 5 AW & 2 GD?) and a Balron, and by the time I managed to single them out and kill them all, the chest loot despawned.
Next best option might be a Disco/AI (or similar) Cu for the initial spawn, then before starting the chest looting go back and get the 5-slot giant beetle, as it can handle individual spawn.