How to join multiple rollups into one big array with only unique items?

[Kim_Trager1]

I'm using my airtable to attached keywords images. 

I have one big keywords table with multiple categories of different keywords. Then i have multiple linked columns to the different categories. However some of the keywords overlap into different categories.

So I thought I could rollup all my linked columns and do something like this:

ARRAYUNIQUE(ARRAYJOIN(ARRAYJOIN({RollUp1}) & IF({RollUp2}, ',' & ARRAYJOIN({RollUp2})) & IF({RollUp3}, ',' & ARRAYJOIN({RollUp3}))))

However I still have duplicates of keywords in my final array. Does anyone know how I can join my rollups and then filter out all the duplicates?

[ScottWorld]

@Kim_Trager1 Cool, check out my video that I linked to above. It's not a complete training session on using arrays in Make, but it does give some valuable insights into arrays.