I have seen a lot of talk about kroxigors in the second rank losing their multiple attacks due to supporting attacks rule. But under Monstrous Infantry (which kroxigors are) it states that Monstrous Infantry MODELS get their normal attacks (up to three) as supporting attacks. So my question is, how many attacks do kroxigors in the second rank of skinks get: 1 each or 3 each?
They get 3, you quoted the rule. It has no bearing what unit they are in, they are still monstrous infantry even when they are behind skinks. They do not suddenly become normal infantry.