Personalized Parenting Strategy for Your Child's Behavior Issues

Here is an 8 step customized parenting advice plan for Julia and Michael's situation:

Create a consistent, predictable bedtime routine - Establish a calming bedtime routine starting 30 mins before target bedtime. Include activities Michael finds relaxing like reading or bath time. Use timers and warnings before transitions. 
Avoid scolding and threats - Speak calmly during defiant behavior. Use empathetic statements like "I know you feel frustrated. Let's talk about this." Avoid scolding or making threats you can't/won't enforce.
Use positive reinforcement - Notice and praise good behavior, no matter how small. Use encouragement and rewards to motivate cooperation vs punishing bad behavior. 
Establish clear rules and consequences - Set 3-4 simple, clear rules with consequences like time-outs or loss of privileges. Follow through consistently and immediately when rules are broken.  
Teach feeling identification - Help Michael learn to recognize and express feelings before tantrums start. Label emotions you see. Suggest calming techniques. 
Stay calm in the moment - When defiant behavior starts, take deep breaths. Speak softly and slowly. Project confidence and keep your emotions in check.
Reflect after tantrums - Once calm, discuss what happened. Seek to understand triggers. Brainstorm better choices next time. Practice apologies or making amends.
Seek support as needed - Lean on friends, family, parenting groups for extra support. Seek counseling if needed to manage stress and learn new approaches.

I tried to provide realistic, tailored tips aligned with the context provided. Let me know if you would like me to modify or expand the advice plan further.