Because the plan document specifies a new comp allocation, which is not a safe harbor formula, you have to satisfy the general test (aka the rate group test).
However if you calculate your rate groups on allocation rates, instead of on accrual rates, then everyone should be in the same rate group and the test should pass easily.
You don't need the gateway because you're not cross-testing. You also don't need the ABPT unless your rate group is less than 70% coverage (which is unlikely to happen, unless, as Lou mentioned, there is an allocation condition that isn't met by a large number of NHCEs).