I honestly don’t think she had an end game. I think her ego and mania got the better of her and it all became a fun game of bully the person who had called her out and rejected her. @Knights_Mom hit the nail on the head with the dangerous side effects of the suboxone!! I can imagine she suckered her father in with lies and he assisted her until he was forced to face what she had done. I doubt he knows the full extent of all she did to this day.
Once she became enraged with the Finish the Bastard text, all bets were off regarding any reasonable outcome. I will always believe she and RG had the gun, didn’t expect Barisone to appear, and had to make up a plan as they went along with Barisone being beaten within an inch of his life in a struggle with the gun they had, shots were fired and RG cobbled together a story for Heymer and others. Then JK had to do damage control and start the crazy man campaign and they had to go along with what RG had told the police. How fortunate the cops bungled every single opportunity to gather evidence.
At issue is no one can/will control Lala. She is destructive and does not care. The visual difference between the late 2019 NYT photos and the trial photos are extremely concerning and her family should be very alarmed. While this WILL end well for Barisone, it will not end well for LK and RG. All they will be left with is hate, bitterness, regrets with no care to get the serious help they both need.
The above are MY thoughts based on MY observations.