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Are you referring to experience with increasing this card or US Bank in general? Because in general you always have the option to request an increase, the choice of it being a HP may vary though.
Having a CLI done using the original HP is a possibility. If you are speaking with a competent Backdoor rep they will make the notes to the analyst such as "only facilitate request using one HP or same HP etc."
I had a similar experience when increasing the CL on both my Cash + cards using one HP. Analyst did exactly as was asked and both were approved with one HP.
Good luck! They are conservative, but if your credit file supports your request they do accommodate their customers.