beast mode processing limitations

Our Domo instance is limited with federated data, but I noticed I can create case statements in beast mode to create a new field with associations with case statements. For example, I can map customers to an account manager with a statement, e.g. (CASE WHEN `Customer` = 'Joe Harris' THEN 'Mark Smith'), and I can use that beast mode in domo to manage around associations. I was able to get it to work with a sample of like 10, but when I tried to run around 1600 case statements, it timed out. I'm guessing its simply too much processing, but it doesn't give me any error to know for sure. I welcome any thoughts.

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