Help me build a content pillar strategy for LinkedIn.

My role / industry: {{role}}
My expertise: {{expertise}}
My audience: {{audience}}
My goal: {{goal}} (brand, clients, hiring, jobs)
How many posts per week I can sustain: {{frequency}}

Return:
1. 3-4 content pillars — each is a recurring theme I can mine for years
2. For each pillar: why it works for my audience, what topics fit under it, sample post angles
3. A rotation across pillars per week
4. Post formats to mix: story, framework/list, contrarian take, case study, behind-the-scenes
5. The pillar I should lean hardest on first
6. Topics I'm tempted to post about but should AVOID
7. The one habit (engaging on other posts, replying to comments) more important than my own posting
8. A 4-week plan to test these pillars