I have a 3 co. controlled group with 2 of the companies use a points allocation formula and the 3rd a pro-rata formula. Do I need to run a rate group test since the contribution formulas are not uniform?

The first question is whether each individual plan can pass all discrimination tests by itself. If so, and considering the total employees of the group in the ratio tests, then you can have each plan on its own. However, you must include all plans for the average benefits percentage test if you are not using the 70% ratio test to pass coverage.

If any one plan fails on its own merits, then you voluntarily or "permissively aggregate" plans. You might combine the plans any of 4 ways to get a passing result.

A & B
B & C
A & C
A & B & C

Good luck with your testing.