On a related note, that IA2 can change what rotation you might want to use, especially when it's at 100% (like it is for me on Adamantite Ore).
Previously, I might use the standard 600-CP rotation: DE-MA DE-MA SM-MA (pronounced "Deema Deema Smma") for 459+ (if memory serves) base collectability: 4x the base Collectability of MA. Costs 30 wear and two gathering attempts.
However, when IA2 is at 100%, I like to use this 600CP rotation: UC-IA2 SM-IA2 SM-AI2 MA. This gives 4.2x the base Collectability of MA, and also costs 30 wear and two gathering attempts. Getting 4.2x instead of 4x increases the chance of getting the next level of Scrip reward.
Another possible different rotation: I'm seeing a lot of SB collectable nodes getting an HQ buff that puts me at 100% HQ chance. Unlike HW, an HQ strike now does give you more collectability that an NQ strike (in HW, HQ Vs. NQ made no difference). So when I see I have a guaranteed HQ, I use SM-IA2 (DE/SM)-MA DE-MA, where the DE/SM means use DE is IA2 did not proc and use SM if it did. This gives 447 minimum collectability, but the guaranteed HQ means final collectability will always be over 450, and if the IA2 proc'd, you get an extra gathering attempt versus Deema Deema Smma.
I'm running 1150 Gather/ 1200 perception BTW.
