This WeakAura is now obsolete, the basic function it performed has been baked into Hekili version v8.3.7-04. To use that function in Hekili go to Beast Mastery -> Targeting tab -> check Use Pet-Based Detection. This aura will stay here for legacy purposes. If you still need a visual method to see your Beast Cleave targets, I suggest using tsurugi's aura this was forked from.
Fork of Visual Beast Cleave with a Hacky kind of way to toggle between ST and AOE modes in Hekili.
In order for this to work, you first have to meet all the requirements for Visual Beast Cleave (see original WA for details). You also need to set up your Toggles setting in Hekili to only have Single-Target and AOE (Multi-Target) checked under Display Modes. Please see the image for an example.
I have also included a Blacklist option in the Custom Options. Just enter the Unit IDs of the creatures you wish to ignore separated by a space. By default it ignores Explosive Orbs, but now you can easily add others like Spark Bots from the High Tinker Mekkatorque encounter for example.
Please note that this may be an unusual way to accomplish this and is done only to fill in functionality until such a time that functionality is baked into Hekili. It may break your stuff, or wreck your DPS I don't know. However it works for me and your millage may vary. I take absolutely no responsibility if anything 'bad' happens, however I do take responsibility if anything 'good' happens.